Your post should focus on the usage of color. Please note that this does not mean it should focus on your personal coloring of the caps, but instead on the colors that appear naturally in the thing that you are spamming. Whether you want to stick with one thing and organize a number of caps by the primary colors used in those caps or maybe take one specific color and use caps from a number of different sources is entirely up to you.
Colors are OFTEN used to symbolize something, represent a deeper meaning, or evoke a certain mood, so look for it! Exploring that in a picspam could make a very unique and interesting spam.
ALSO! Don't feel the need to be limited by fandom. You could do a spam of colors prominent in different boroughs of a city or usage of color in royal portraiture. Sky's the limit, so don't think of just film and television!
Deadline: September 30.
This one is a bit more outside the box so have fun!
If you have any questions about the challenge, feel free to ask!