For this piece, I had to make a color appear as 2 different colors by changing the color behind it.  This was definitely one of the most interesting projects we’ve done.  I had no idea that I could make one blue look like 2 different shades of blue by changing what was around it.  For some of the squares, I had to change the value of the surrounding color.  I had to alter the hue instead of values for some.  For others, I changed both hue and value.  I found that this made the center squares appear either lighter are darker (lighter if the background was dark and darker if the background was light) even though they were the same colors.  I also saw a “halo” of whatever the complementary color of the background, which was something new.