missing function Blockly.hueToRgb

[charlesgetup]

Describe the bug

In demos/blockfactory/block_definition_extractor.js, line 719, Blockly.hueToRgb function is not defined. And this makes base block in block factory main workspace disappear after a manual JSON change.

To Reproduce

Steps to reproduce the behavior:

1. Open the demo block factory and change the block type in base block, e.g. I changed it to "test";
2. Change the Block Definition format to "Manual JSON..." and make a change, e.g. I changed colour hue from 230 to 200;
3. Switch the Block Definition format back to "JSON", the changes stays in preview workspace, but the base block in main workspace is gone.

Expected behavior

After making a manual JSON code change, the base block in main workspace should still be there.

Screenshots

Screenshots are uploaded in Blockly Groups.

Desktop (please complete the following information):

• OS: Ubuntu 20.04.4 LTS
• Browser chrome
• Version 101.0.4951.64 (Official Build) (64-bit)

Additional context

I have figured out a fix.

Replace line 718 - 720 in demos/blockfactory/block_definition_extractor.js with the following code.

var colourHex = Blockly.utils.colour.hsvToHex(hue, Blockly.HSV_SATURATION, 255 * Blockly.HSV_VALUE);
colourBlock.append(BlockDefinitionExtractor.newDomElement_('mutation', {
    colour: colourHex
}));