I got sidetracked for the last couple days by my frustration with the lack of colorpickers that support the 0-1 RGBA vectors that Defold uses, so I made my own. I thought some other people might want to use it, or steal bits of it for their projects, so here it is: https://github.com/rgrams/colorpicker
You can try a web version on the asset portal.
On non-web platforms it uses Britzl’s clipboard extension to copy the color vector to your clipboard every time you select a color, so you can just paste it into your scripts. (except on Linux…)
A windows build: Colorpicker 0.8.zip (1.5 MB)
A screenshot: