The color wheel
Apparently, this guy’s girlfriend had a good time teasing him because she thought all of his shirts were the same color (we all know a person like that). Well, he was determined to prove her wrong, and so he set up this aesthetically-appealing display showing that his shirts were, in fact, different colors.
Well, his girlfriend couldn’t argue with that! His shirts are clearly all distinctly different shades of blue and green. However, maybe it would be a good idea to be a little adventurous and try out some reds, purples, or yellow. It’s always fun to do a little fashion experimentation, and he can always go back to hues of green and blue.