Even though it's already taken, I would use the colors of the rainbow to symbolize equality. Surrounding the rainbow would be black not only to make the colors pop but also to symbolize the pain and suffering that we've overcome. I would border that with yellow for happiness and joy.
Black and green, black for power and green for prosperity
Yellow, and ocean colors
Joy and longevity
Blue and green for water and forests, both of which we have plenty.
Purple and white.. Police and grapes
Pink green and red
Pink for manleynes green for nature and red for sacrifce
I think gray and blue would look nice, but I don't care much for symbols. If I wanted it to mean something, I guess rainbow would be good but that's taken.
Green for peace, white for purity, black for power and orange for a cultural flare