Do better color matching by comparing colors in HSV space instead of
RGB space. HSV is closer to our perception of color diference but cheaper
to calculated than the LAB which woul be an even better color space to use.
This fixes a couple of the tests by correctly grouping all of the colors.
Currently the remaining broken test is the one with the rubiks logo.
The solution for that is to find the most common color on a cubelet vs.
the average color.