diff --git a/src/components/color-button/color-button.css b/src/components/color-button/color-button.css
index 1fd2e0c0..5ef6744d 100644
--- a/src/components/color-button/color-button.css
+++ b/src/components/color-button/color-button.css
@@ -5,6 +5,7 @@
 }
 
 .color-button-swatch {
+    position: relative;
     display: flex;
     flex-basis: 2rem;
     flex-shrink: 0;
@@ -30,3 +31,23 @@
     color: #575e75;
     font-size: 0.75rem;
 }
+
+.swatch-icon {
+    width: 1.75rem;
+    margin: auto;
+    /* Make sure it appears above the outline box */
+    z-index: 2;
+}
+
+.outline-swatch:after {
+    content: "";
+    position: absolute;
+    top: calc(0.5rem + 1px);
+    left: calc(0.5rem + 1px);
+    width: 0.75rem;
+    height: 0.75rem;
+    background: white;
+    border: 1px solid rgba(0, 0, 0, 0.25);
+    /* Make sure it appears below the transparent icon */
+    z-index: 1;
+}
diff --git a/src/components/color-button/color-button.jsx b/src/components/color-button/color-button.jsx
index 9a7087e5..067a8ee5 100644
--- a/src/components/color-button/color-button.jsx
+++ b/src/components/color-button/color-button.jsx
@@ -1,26 +1,55 @@
 import React from 'react';
 import PropTypes from 'prop-types';
+import classNames from 'classnames';
 
+import {MIXED} from '../../helper/style-path';
+
+import noFillIcon from './no-fill.svg';
+import mixedFillIcon from './mixed-fill.svg';
 import styles from './color-button.css';
 
+const colorToBackground = color => {
+    if (color === MIXED || color === null) return 'white';
+    return color;
+};
+
 const ColorButtonComponent = props => (
     <div
         className={styles.colorButton}
         onClick={props.onClick}
     >
         <div
-            className={styles.colorButtonSwatch}
+            className={classNames(styles.colorButtonSwatch, {
+                [styles.outlineSwatch]: props.outline
+            })}
             style={{
-                background: props.color
+                background: colorToBackground(props.color)
             }}
-        />
+        >
+            {props.color === null ? (
+                <img
+                    className={styles.swatchIcon}
+                    src={noFillIcon}
+                />
+            ) : ((props.color === MIXED ? (
+                <img
+                    className={styles.swatchIcon}
+                    src={mixedFillIcon}
+                />
+            ) : null))}
+        </div>
         <div className={styles.colorButtonArrow}>▾</div>
     </div>
 );
 
 ColorButtonComponent.propTypes = {
     color: PropTypes.string,
-    onClick: PropTypes.func.isRequired
+    onClick: PropTypes.func.isRequired,
+    outline: PropTypes.bool.isRequired
+};
+
+ColorButtonComponent.defaultProps = {
+    outline: false
 };
 
 export default ColorButtonComponent;
diff --git a/src/components/color-button/mixed-fill.svg b/src/components/color-button/mixed-fill.svg
new file mode 100644
index 00000000..7a4fbcde
--- /dev/null
+++ b/src/components/color-button/mixed-fill.svg
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg width="20px" height="20px" viewBox="0 0 20 20" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <!-- Generator: Sketch 43.2 (39069) - http://www.bohemiancoding.com/sketch -->
+    <title>mixed-fill</title>
+    <desc>Created with Sketch.</desc>
+    <defs></defs>
+    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" fill-opacity="0.75">
+        <g id="mixed-fill">
+            <g id="mixed-fill-icon" transform="translate(2.000000, 2.500000)">
+                <circle id="blue" fill="#4C97FF" cx="4.5" cy="10.5" r="4.5"></circle>
+                <circle id="red" fill="#FF5500" cx="8" cy="4.5" r="4.5"></circle>
+                <circle id="yellow" fill="#FFBF00" cx="11.4099998" cy="10.5" r="4.5"></circle>
+            </g>
+        </g>
+    </g>
+</svg>
diff --git a/src/components/color-button/no-fill.svg b/src/components/color-button/no-fill.svg
new file mode 100644
index 00000000..d955dda1
--- /dev/null
+++ b/src/components/color-button/no-fill.svg
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg width="20px" height="20px" viewBox="0 0 20 20" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <!-- Generator: Sketch 43.2 (39069) - http://www.bohemiancoding.com/sketch -->
+    <title>no-fill</title>
+    <desc>Created with Sketch.</desc>
+    <defs></defs>
+    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" stroke-linecap="square">
+        <g id="no-fill" stroke="#FF661A" stroke-width="2">
+            <path d="M3,17 L17,3" id="Line"></path>
+        </g>
+    </g>
+</svg>
\ No newline at end of file
diff --git a/src/components/color-picker/color-picker.css b/src/components/color-picker/color-picker.css
index 5ef9b537..3a796cff 100644
--- a/src/components/color-picker/color-picker.css
+++ b/src/components/color-picker/color-picker.css
@@ -48,3 +48,7 @@
     border: 1px solid #4C97FF;
     box-shadow: 0px 0px 0px 3px hsla(215, 100%, 65%, 0.2);
 }
+
+.swatch > img {
+    max-width: 100%;
+}
diff --git a/src/components/color-picker/color-picker.jsx b/src/components/color-picker/color-picker.jsx
index ab54a986..1317a510 100644
--- a/src/components/color-picker/color-picker.jsx
+++ b/src/components/color-picker/color-picker.jsx
@@ -9,6 +9,7 @@ import {MIXED} from '../../helper/style-path';
 
 import Slider from '../forms/slider.jsx';
 import styles from './color-picker.css';
+import noFillIcon from '../color-button/no-fill.svg';
 
 const colorStringToHsv = hexString => {
     const hsv = parseColor(hexString).hsv;
@@ -179,7 +180,9 @@ class ColorPickerComponent extends React.Component {
                                 [styles.activeSwatch]: this.props.color === null
                             })}
                             onClick={this.handleTransparent}
-                        />
+                        >
+                            <img src={noFillIcon} />
+                        </div>
                     </div>
                 </div>
             </div>
diff --git a/src/components/fill-color-indicator.jsx b/src/components/fill-color-indicator.jsx
index 1e696ea5..4e49c145 100644
--- a/src/components/fill-color-indicator.jsx
+++ b/src/components/fill-color-indicator.jsx
@@ -17,7 +17,7 @@ const messages = defineMessages({
 });
 
 const FillColorIndicatorComponent = props => (
-    <InputGroup>
+    <InputGroup disabled={props.disabled}>
         <Popover
             body={
                 <ColorPicker
@@ -40,6 +40,7 @@ const FillColorIndicatorComponent = props => (
 );
 
 FillColorIndicatorComponent.propTypes = {
+    disabled: PropTypes.bool.isRequired,
     fillColor: PropTypes.string,
     fillColorModalVisible: PropTypes.bool.isRequired,
     intl: intlShape,
diff --git a/src/components/input-group/input-group.css b/src/components/input-group/input-group.css
index 80fdba7a..66905a2a 100644
--- a/src/components/input-group/input-group.css
+++ b/src/components/input-group/input-group.css
@@ -3,3 +3,9 @@
 .input-group + .input-group {
     margin-left: calc(3 * $grid-unit);
 }
+
+.disabled {
+    opacity: 0.3;
+    /* Prevent any user actions */
+    pointer-events: none;
+}
diff --git a/src/components/input-group/input-group.jsx b/src/components/input-group/input-group.jsx
index 423dc5e7..db009ed3 100644
--- a/src/components/input-group/input-group.jsx
+++ b/src/components/input-group/input-group.jsx
@@ -5,14 +5,19 @@ import PropTypes from 'prop-types';
 import styles from './input-group.css';
 
 const InputGroup = props => (
-    <div className={classNames(props.className, styles.inputGroup)}>
+    <div
+        className={classNames(props.className, styles.inputGroup, {
+            [styles.disabled]: props.disabled
+        })}
+    >
         {props.children}
     </div>
 );
 
 InputGroup.propTypes = {
     children: PropTypes.node.isRequired,
-    className: PropTypes.string
+    className: PropTypes.string,
+    disabled: PropTypes.bool
 };
 
 export default InputGroup;
diff --git a/src/components/stroke-color-indicator.jsx b/src/components/stroke-color-indicator.jsx
index 5a3cfae0..5759ddba 100644
--- a/src/components/stroke-color-indicator.jsx
+++ b/src/components/stroke-color-indicator.jsx
@@ -17,7 +17,7 @@ const messages = defineMessages({
 });
 
 const StrokeColorIndicatorComponent = props => (
-    <InputGroup>
+    <InputGroup disabled={props.disabled}>
         <Popover
             body={
                 <ColorPicker
@@ -31,6 +31,7 @@ const StrokeColorIndicatorComponent = props => (
         >
             <Label text={props.intl.formatMessage(messages.stroke)}>
                 <ColorButton
+                    outline
                     color={props.strokeColor}
                     onClick={props.onOpenStrokeColor}
                 />
@@ -40,6 +41,7 @@ const StrokeColorIndicatorComponent = props => (
 );
 
 StrokeColorIndicatorComponent.propTypes = {
+    disabled: PropTypes.bool.isRequired,
     intl: intlShape,
     onChangeStrokeColor: PropTypes.func.isRequired,
     onCloseStrokeColor: PropTypes.func.isRequired,
diff --git a/src/components/stroke-width-indicator.jsx b/src/components/stroke-width-indicator.jsx
index fe5267c0..a0947b67 100644
--- a/src/components/stroke-width-indicator.jsx
+++ b/src/components/stroke-width-indicator.jsx
@@ -9,9 +9,10 @@ import {MAX_STROKE_WIDTH} from '../reducers/stroke-width';
 
 const BufferedInput = BufferedInputHOC(Input);
 const StrokeWidthIndicatorComponent = props => (
-    <InputGroup>
+    <InputGroup disabled={props.disabled}>
         <BufferedInput
             small
+            disabled={props.disabled}
             max={MAX_STROKE_WIDTH}
             min="0"
             type="number"
@@ -22,6 +23,7 @@ const StrokeWidthIndicatorComponent = props => (
 );
 
 StrokeWidthIndicatorComponent.propTypes = {
+    disabled: PropTypes.bool.isRequired,
     onChangeStrokeWidth: PropTypes.func.isRequired,
     strokeWidth: PropTypes.number
 };
diff --git a/src/containers/brush-mode.jsx b/src/containers/brush-mode.jsx
index f525deab..a9401f38 100644
--- a/src/containers/brush-mode.jsx
+++ b/src/containers/brush-mode.jsx
@@ -4,7 +4,9 @@ import {connect} from 'react-redux';
 import bindAll from 'lodash.bindall';
 import Modes from '../modes/modes';
 import Blobbiness from '../helper/blob-tools/blob';
+import {MIXED} from '../helper/style-path';
 
+import {changeFillColor} from '../reducers/fill-color';
 import {changeBrushSize} from '../reducers/brush-mode';
 import {changeMode} from '../reducers/modes';
 import {clearSelectedItems} from '../reducers/selected-items';
@@ -13,6 +15,9 @@ import {clearSelection} from '../helper/selection';
 import BrushModeComponent from '../components/brush-mode/brush-mode.jsx';
 
 class BrushMode extends React.Component {
+    static get DEFAULT_COLOR () {
+        return '#9966FF';
+    }
     constructor (props) {
         super(props);
         bindAll(this, [
@@ -49,6 +54,12 @@ class BrushMode extends React.Component {
         // analogous to how selection works with eraser
         clearSelection(this.props.clearSelectedItems);
 
+        // Force the default brush color if fill is MIXED or transparent
+        const {fillColor} = this.props.colorState;
+        if (fillColor === MIXED || fillColor === null) {
+            this.props.onChangeFillColor(BrushMode.DEFAULT_COLOR);
+        }
+
         // TODO: This is temporary until a component that provides the brush size is hooked up
         this.props.canvas.addEventListener('mousewheel', this.onScroll);
         this.blob.activateTool({
@@ -93,6 +104,7 @@ BrushMode.propTypes = {
     }).isRequired,
     handleMouseDown: PropTypes.func.isRequired,
     isBrushModeActive: PropTypes.bool.isRequired,
+    onChangeFillColor: PropTypes.func.isRequired,
     onUpdateSvg: PropTypes.func.isRequired
 };
 
@@ -110,6 +122,9 @@ const mapDispatchToProps = dispatch => ({
     },
     handleMouseDown: () => {
         dispatch(changeMode(Modes.BRUSH));
+    },
+    onChangeFillColor: fillColor => {
+        dispatch(changeFillColor(fillColor));
     }
 });
 
diff --git a/src/containers/fill-color-indicator.jsx b/src/containers/fill-color-indicator.jsx
index ab7a5d8a..73757694 100644
--- a/src/containers/fill-color-indicator.jsx
+++ b/src/containers/fill-color-indicator.jsx
@@ -4,6 +4,7 @@ import React from 'react';
 import bindAll from 'lodash.bindall';
 import {changeFillColor} from '../reducers/fill-color';
 import {openFillColor, closeFillColor} from '../reducers/modals';
+import Modes from '../modes/modes';
 
 import FillColorIndicatorComponent from '../components/fill-color-indicator.jsx';
 import {applyFillColorToSelection} from '../helper/style-path';
@@ -30,6 +31,7 @@ class FillColorIndicator extends React.Component {
 }
 
 const mapStateToProps = state => ({
+    disabled: state.scratchPaint.mode === Modes.PEN,
     fillColor: state.scratchPaint.color.fillColor,
     fillColorModalVisible: state.scratchPaint.modals.fillColor
 });
@@ -47,6 +49,7 @@ const mapDispatchToProps = dispatch => ({
 });
 
 FillColorIndicator.propTypes = {
+    disabled: PropTypes.bool.isRequired,
     fillColor: PropTypes.string,
     onChangeFillColor: PropTypes.func.isRequired,
     onUpdateSvg: PropTypes.func.isRequired
diff --git a/src/containers/line-mode.jsx b/src/containers/line-mode.jsx
index e9d5c592..476f329d 100644
--- a/src/containers/line-mode.jsx
+++ b/src/containers/line-mode.jsx
@@ -8,8 +8,11 @@ import {clearSelection} from '../helper/selection';
 import {endPointHit, touching} from '../helper/snapping';
 import {drawHitPoint, removeHitPoint} from '../helper/guides';
 import {stylePath} from '../helper/style-path';
+import {changeStrokeColor} from '../reducers/stroke-color';
+import {changeStrokeWidth} from '../reducers/stroke-width';
 import {changeMode} from '../reducers/modes';
 import {clearSelectedItems} from '../reducers/selected-items';
+import {MIXED} from '../helper/style-path';
 
 import LineModeComponent from '../components/line-mode/line-mode.jsx';
 
@@ -17,6 +20,9 @@ class LineMode extends React.Component {
     static get SNAP_TOLERANCE () {
         return 6;
     }
+    static get DEFAULT_COLOR () {
+        return '#000000';
+    }
     constructor (props) {
         super(props);
         bindAll(this, [
@@ -46,8 +52,18 @@ class LineMode extends React.Component {
     }
     activateTool () {
         clearSelection(this.props.clearSelectedItems);
+
+        // Force the default line color if stroke is MIXED or transparent
+        const {strokeColor} = this.props.colorState;
+        if (strokeColor === MIXED || strokeColor === null) {
+            this.props.onChangeStrokeColor(LineMode.DEFAULT_COLOR);
+        }
+        // Force a minimum stroke width
+        if (!this.props.colorState.strokeWidth) {
+            this.props.onChangeStrokeWidth(1);
+        }
         this.tool = new paper.Tool();
-        
+
         this.path = null;
         this.hitResult = null;
 
@@ -182,7 +198,7 @@ class LineMode extends React.Component {
             removeHitPoint();
             this.hitResult = null;
         }
-        
+
         if (this.path) {
             this.props.onUpdateSvg();
             this.path = null;
@@ -220,6 +236,8 @@ LineMode.propTypes = {
     }).isRequired,
     handleMouseDown: PropTypes.func.isRequired,
     isLineModeActive: PropTypes.bool.isRequired,
+    onChangeStrokeColor: PropTypes.func.isRequired,
+    onChangeStrokeWidth: PropTypes.func.isRequired,
     onUpdateSvg: PropTypes.func.isRequired
 };
 
@@ -233,6 +251,12 @@ const mapDispatchToProps = dispatch => ({
     },
     handleMouseDown: () => {
         dispatch(changeMode(Modes.LINE));
+    },
+    onChangeStrokeColor: strokeColor => {
+        dispatch(changeStrokeColor(strokeColor));
+    },
+    onChangeStrokeWidth: strokeWidth => {
+        dispatch(changeStrokeWidth(strokeWidth));
     }
 });
 
diff --git a/src/containers/pen-mode.jsx b/src/containers/pen-mode.jsx
index d971f496..266b3560 100644
--- a/src/containers/pen-mode.jsx
+++ b/src/containers/pen-mode.jsx
@@ -4,14 +4,20 @@ import {connect} from 'react-redux';
 import bindAll from 'lodash.bindall';
 import Modes from '../modes/modes';
 
+import {changeStrokeColor} from '../reducers/stroke-color';
+import {changeStrokeWidth} from '../reducers/stroke-width';
 import {changeMode} from '../reducers/modes';
 import {clearSelectedItems} from '../reducers/selected-items';
+import {MIXED} from '../helper/style-path';
 
 import {clearSelection} from '../helper/selection';
 import PenTool from '../helper/tools/pen-tool';
 import PenModeComponent from '../components/pen-mode/pen-mode.jsx';
 
 class PenMode extends React.Component {
+    static get DEFAULT_COLOR () {
+        return '#000000';
+    }
     constructor (props) {
         super(props);
         bindAll(this, [
@@ -42,6 +48,15 @@ class PenMode extends React.Component {
     }
     activateTool () {
         clearSelection(this.props.clearSelectedItems);
+        // Force the default pen color if stroke is MIXED or transparent
+        const {strokeColor} = this.props.colorState;
+        if (strokeColor === MIXED || strokeColor === null) {
+            this.props.onChangeStrokeColor(PenMode.DEFAULT_COLOR);
+        }
+        // Force a minimum stroke width
+        if (!this.props.colorState.strokeWidth) {
+            this.props.onChangeStrokeWidth(1);
+        }
         this.tool = new PenTool(
             this.props.clearSelectedItems,
             this.props.onUpdateSvg
@@ -73,6 +88,8 @@ PenMode.propTypes = {
     }).isRequired,
     handleMouseDown: PropTypes.func.isRequired,
     isPenModeActive: PropTypes.bool.isRequired,
+    onChangeStrokeColor: PropTypes.func.isRequired,
+    onChangeStrokeWidth: PropTypes.func.isRequired,
     onUpdateSvg: PropTypes.func.isRequired
 };
 
@@ -89,6 +106,12 @@ const mapDispatchToProps = dispatch => ({
         dispatch(changeMode(Modes.PEN));
     },
     deactivateTool () {
+    },
+    onChangeStrokeColor: strokeColor => {
+        dispatch(changeStrokeColor(strokeColor));
+    },
+    onChangeStrokeWidth: strokeWidth => {
+        dispatch(changeStrokeWidth(strokeWidth));
     }
 });
 
diff --git a/src/containers/stroke-color-indicator.jsx b/src/containers/stroke-color-indicator.jsx
index 88d681c4..240be3ee 100644
--- a/src/containers/stroke-color-indicator.jsx
+++ b/src/containers/stroke-color-indicator.jsx
@@ -4,6 +4,7 @@ import React from 'react';
 import bindAll from 'lodash.bindall';
 import {changeStrokeColor} from '../reducers/stroke-color';
 import {openStrokeColor, closeStrokeColor} from '../reducers/modals';
+import Modes from '../modes/modes';
 
 import StrokeColorIndicatorComponent from '../components/stroke-color-indicator.jsx';
 import {applyStrokeColorToSelection} from '../helper/style-path';
@@ -30,6 +31,7 @@ class StrokeColorIndicator extends React.Component {
 }
 
 const mapStateToProps = state => ({
+    disabled: state.scratchPaint.mode === Modes.BRUSH,
     strokeColor: state.scratchPaint.color.strokeColor,
     strokeColorModalVisible: state.scratchPaint.modals.strokeColor
 });
@@ -47,6 +49,7 @@ const mapDispatchToProps = dispatch => ({
 });
 
 StrokeColorIndicator.propTypes = {
+    disabled: PropTypes.bool.isRequired,
     onChangeStrokeColor: PropTypes.func.isRequired,
     onUpdateSvg: PropTypes.func.isRequired,
     strokeColor: PropTypes.string
diff --git a/src/containers/stroke-width-indicator.jsx b/src/containers/stroke-width-indicator.jsx
index fe836b8a..14e717e1 100644
--- a/src/containers/stroke-width-indicator.jsx
+++ b/src/containers/stroke-width-indicator.jsx
@@ -5,6 +5,7 @@ import bindAll from 'lodash.bindall';
 import {changeStrokeWidth} from '../reducers/stroke-width';
 import StrokeWidthIndicatorComponent from '../components/stroke-width-indicator.jsx';
 import {applyStrokeWidthToSelection} from '../helper/style-path';
+import Modes from '../modes/modes';
 
 class StrokeWidthIndicator extends React.Component {
     constructor (props) {
@@ -20,6 +21,7 @@ class StrokeWidthIndicator extends React.Component {
     render () {
         return (
             <StrokeWidthIndicatorComponent
+                disabled={this.props.disabled}
                 strokeWidth={this.props.strokeWidth}
                 onChangeStrokeWidth={this.handleChangeStrokeWidth}
             />
@@ -28,6 +30,7 @@ class StrokeWidthIndicator extends React.Component {
 }
 
 const mapStateToProps = state => ({
+    disabled: state.scratchPaint.mode === Modes.BRUSH,
     strokeWidth: state.scratchPaint.color.strokeWidth
 });
 const mapDispatchToProps = dispatch => ({
@@ -37,6 +40,7 @@ const mapDispatchToProps = dispatch => ({
 });
 
 StrokeWidthIndicator.propTypes = {
+    disabled: PropTypes.bool.isRequired,
     onChangeStrokeWidth: PropTypes.func.isRequired,
     onUpdateSvg: PropTypes.func.isRequired,
     strokeWidth: PropTypes.number