Nerd!

Today's puzzle was inspired by /basecolors and @phil ! I love a good color swatch and there's some great ones below but can you guess what type of colors are my favorite? My humble 24 degen to the first solver!

Congrats to @brownbear29 for finally solving! 
Solution:
6 out of 7 refers to 6 colors of the rainbow. Each color and image pair together because they each share one letter in common in the same place. Taking those letters and putting them into rainbow order gives the solution: DAYGLO

Aspiring puzzle maker and ok puzzler solver.

Bro, what the hell. Great puzzle!
Hard too.