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diff --git a/blockly/generators/lua/colour.js b/blockly/generators/lua/colour.js
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+/**
+ * @license
+ * Visual Blocks Language
+ *
+ * Copyright 2016 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 Generating Lua for colour blocks.
+ * @author rodrigoq@google.com (Rodrigo Queiro)
+ */
+'use strict';
+
+goog.provide('Blockly.Lua.colour');
+
+goog.require('Blockly.Lua');
+
+
+Blockly.Lua['colour_picker'] = function(block) {
+  // Colour picker.
+  var code = '\'' + block.getFieldValue('COLOUR') + '\'';
+  return [code, Blockly.Lua.ORDER_ATOMIC];
+};
+
+Blockly.Lua['colour_random'] = function(block) {
+  // Generate a random colour.
+  var code = 'string.format("#%06x", math.random(0, 2^24 - 1))';
+  return [code, Blockly.Lua.ORDER_HIGH];
+};
+
+Blockly.Lua['colour_rgb'] = function(block) {
+  // Compose a colour from RGB components expressed as percentages.
+  var functionName = Blockly.Lua.provideFunction_(
+      'colour_rgb',
+      ['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(r, g, b)',
+       '  r = math.floor(math.min(100, math.max(0, r)) * 2.55 + .5)',
+       '  g = math.floor(math.min(100, math.max(0, g)) * 2.55 + .5)',
+       '  b = math.floor(math.min(100, math.max(0, b)) * 2.55 + .5)',
+       '  return string.format("#%02x%02x%02x", r, g, b)',
+       'end']);
+  var r = Blockly.Lua.valueToCode(block, 'RED',
+      Blockly.Lua.ORDER_NONE) || 0;
+  var g = Blockly.Lua.valueToCode(block, 'GREEN',
+      Blockly.Lua.ORDER_NONE) || 0;
+  var b = Blockly.Lua.valueToCode(block, 'BLUE',
+      Blockly.Lua.ORDER_NONE) || 0;
+  var code = functionName + '(' + r + ', ' + g + ', ' + b + ')';
+  return [code, Blockly.Lua.ORDER_HIGH];
+};
+
+Blockly.Lua['colour_blend'] = function(block) {
+  // Blend two colours together.
+  var functionName = Blockly.Lua.provideFunction_(
+      'colour_blend',
+      ['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
+           '(colour1, colour2, ratio)',
+       '  local r1 = tonumber(string.sub(colour1, 2, 3), 16)',
+       '  local r2 = tonumber(string.sub(colour2, 2, 3), 16)',
+       '  local g1 = tonumber(string.sub(colour1, 4, 5), 16)',
+       '  local g2 = tonumber(string.sub(colour2, 4, 5), 16)',
+       '  local b1 = tonumber(string.sub(colour1, 6, 7), 16)',
+       '  local b2 = tonumber(string.sub(colour2, 6, 7), 16)',
+       '  local ratio = math.min(1, math.max(0, ratio))',
+       '  local r = math.floor(r1 * (1 - ratio) + r2 * ratio + .5)',
+       '  local g = math.floor(g1 * (1 - ratio) + g2 * ratio + .5)',
+       '  local b = math.floor(b1 * (1 - ratio) + b2 * ratio + .5)',
+       '  return string.format("#%02x%02x%02x", r, g, b)',
+       'end']);
+  var colour1 = Blockly.Lua.valueToCode(block, 'COLOUR1',
+      Blockly.Lua.ORDER_NONE) || '\'#000000\'';
+  var colour2 = Blockly.Lua.valueToCode(block, 'COLOUR2',
+      Blockly.Lua.ORDER_NONE) || '\'#000000\'';
+  var ratio = Blockly.Lua.valueToCode(block, 'RATIO',
+      Blockly.Lua.ORDER_NONE) || 0;
+  var code = functionName + '(' + colour1 + ', ' + colour2 + ', ' + ratio + ')';
+  return [code, Blockly.Lua.ORDER_HIGH];
+};