Inspired by this puzzle I decided to make something similar. To warm up, I made something simple. It follows the rules set up by @Dmihawk except for the size:
Final answer: (1,6)
The colors can be decoded
using their RGB values: each one is either 0, 125, or 250. Decoding each color as ternary yields SIMPLE.
(Not sure what the other letter could be, because this uses all of the given information...)