+1, I think this would be a fun idea and would give a little more flavor to chandlers and herbalists.

So, from my previous poking at it, I think the standard 16 colors are approximately: r - daa R - faa c - add C - aff g - ada G - afa y - dda Y - ffa b - aad B - aaf w - ddd W - fff m - dad M - faf Though of course they work differently. From poking at it, I'd say, ones that aren't necessarily ideal...