Yes Debs more colour, I was frustrated with how hard it was to dial up a particular colour when working with voxels, have to find the colour I want with Rainbow, punch the RGB params into a script and rez a coloured voxel, too slow.
So I created a palette of sorts, utilizing KevinMThomas menu script and some gradient formulas I have come up with.
Running the script produces 2 new menus, a Create, and a Remove .
Under the create there is a selection of colour gradients each will produce a bar of about 20 grades of that colour (see pic)
The pic is all 7 gradient bars,
reds, greens, blues, greys, red to green, green to blue, and blue to red.
Simply dial up a colour ramp and preselect your choice to your UI palette, then remove the palette afterwards.
Use in conjunction with editVoxels.js as posted by @DebsRegent for the extended UI palette of 16 slots.
Get the script from here