Rainbow of ATCS, 1 of 3 -- EDITED

Send your one partner 3 ATCs for the beginning of our rainbow. These ATCs should be made by you.

The colors are red, orange, and yellow, and should dominate the ATC. That's 1 red ATC, 1 orange ATC, and 1 yellow ATC. Open theme otherwise.

Part 2 is green, blue, purple. Part 3 is brown, black, white. When we are done, we will have a whole page of ATCs!

Thanks @ginny19590 for help clarifying swap description.