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diff --git a/blockly/blocks/colour.js b/blockly/blocks/colour.js
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+++ b/blockly/blocks/colour.js
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+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2012 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Colour blocks for Blockly.
+ * @author fraser@google.com (Neil Fraser)
+ */
+'use strict';
+
+goog.provide('Blockly.Blocks.colour');
+
+goog.require('Blockly.Blocks');
+
+
+/**
+ * Common HSV hue for all blocks in this category.
+ */
+Blockly.Blocks.colour.HUE = 20;
+
+Blockly.Blocks['colour_picker'] = {
+  /**
+   * Block for colour picker.
+   * @this Blockly.Block
+   */
+  init: function() {
+    this.jsonInit({
+      "message0": "%1",
+      "args0": [
+        {
+          "type": "field_colour",
+          "name": "COLOUR",
+          "colour": "#ff0000"
+        }
+      ],
+      "output": "Colour",
+      "colour": Blockly.Blocks.colour.HUE,
+      "helpUrl": Blockly.Msg.COLOUR_PICKER_HELPURL
+    });
+    // Assign 'this' to a variable for use in the tooltip closure below.
+    var thisBlock = this;
+    // Colour block is trivial.  Use tooltip of parent block if it exists.
+    this.setTooltip(function() {
+      var parent = thisBlock.getParent();
+      return (parent && parent.getInputsInline() && parent.tooltip) ||
+          Blockly.Msg.COLOUR_PICKER_TOOLTIP;
+    });
+  }
+};
+
+Blockly.Blocks['colour_random'] = {
+  /**
+   * Block for random colour.
+   * @this Blockly.Block
+   */
+  init: function() {
+    this.jsonInit({
+      "message0": Blockly.Msg.COLOUR_RANDOM_TITLE,
+      "output": "Colour",
+      "colour": Blockly.Blocks.colour.HUE,
+      "tooltip": Blockly.Msg.COLOUR_RANDOM_TOOLTIP,
+      "helpUrl": Blockly.Msg.COLOUR_RANDOM_HELPURL
+    });
+  }
+};
+
+Blockly.Blocks['colour_rgb'] = {
+  /**
+   * Block for composing a colour from RGB components.
+   * @this Blockly.Block
+   */
+  init: function() {
+    this.setHelpUrl(Blockly.Msg.COLOUR_RGB_HELPURL);
+    this.setColour(Blockly.Blocks.colour.HUE);
+    this.appendValueInput('RED')
+        .setCheck('Number')
+        .setAlign(Blockly.ALIGN_RIGHT)
+        .appendField(Blockly.Msg.COLOUR_RGB_TITLE)
+        .appendField(Blockly.Msg.COLOUR_RGB_RED);
+    this.appendValueInput('GREEN')
+        .setCheck('Number')
+        .setAlign(Blockly.ALIGN_RIGHT)
+        .appendField(Blockly.Msg.COLOUR_RGB_GREEN);
+    this.appendValueInput('BLUE')
+        .setCheck('Number')
+        .setAlign(Blockly.ALIGN_RIGHT)
+        .appendField(Blockly.Msg.COLOUR_RGB_BLUE);
+    this.setOutput(true, 'Colour');
+    this.setTooltip(Blockly.Msg.COLOUR_RGB_TOOLTIP);
+  }
+};
+
+Blockly.Blocks['colour_blend'] = {
+  /**
+   * Block for blending two colours together.
+   * @this Blockly.Block
+   */
+  init: function() {
+    this.setHelpUrl(Blockly.Msg.COLOUR_BLEND_HELPURL);
+    this.setColour(Blockly.Blocks.colour.HUE);
+    this.appendValueInput('COLOUR1')
+        .setCheck('Colour')
+        .setAlign(Blockly.ALIGN_RIGHT)
+        .appendField(Blockly.Msg.COLOUR_BLEND_TITLE)
+        .appendField(Blockly.Msg.COLOUR_BLEND_COLOUR1);
+    this.appendValueInput('COLOUR2')
+        .setCheck('Colour')
+        .setAlign(Blockly.ALIGN_RIGHT)
+        .appendField(Blockly.Msg.COLOUR_BLEND_COLOUR2);
+    this.appendValueInput('RATIO')
+        .setCheck('Number')
+        .setAlign(Blockly.ALIGN_RIGHT)
+        .appendField(Blockly.Msg.COLOUR_BLEND_RATIO);
+    this.setOutput(true, 'Colour');
+    this.setTooltip(Blockly.Msg.COLOUR_BLEND_TOOLTIP);
+  }
+};