This is a feature request for native color picker support inside Construct 3 games.
Certain games (especially mobile), sometimes allow advanced customization options such as changing the main characters "outfit color" or similar. Instead of creating an overcomplicated, sprite based color picking system all by yourself, making use of the native color picker that every modern browser comes with, would be a lot quicker and more convenient.
I'm not sure if this could be easily implemented into any of the existing form plugins, that's why I would suggest adding a new "exclusive plugin", just for the color picker itself. It would come with basic ACE's to fetch relevant information and also with optional CSS styling, like every other existing form plugin already has.
I've attached an image of how the native color picker currently looks on Windows 7.