It's so so. If you click between colors you can create mix (orange, purple, green) with single click (probably bug).
Reviews for "Sketcher-D"
snoboxstudio responds:
Yes, we were aware of that feature; its not actually a bug. We thought it would be a neat way to quickly do combinations... And it does not work for purple, that I'm aware of, red and blue are separated by yellow, so there's no "between the colours" there.