Você pode usar duas cores, como vermelho e azul, verde e amarelo ou preto e branco. A linha inferior é colocar-se restrições em duas cores.
Sorry man, i forgot that you are not Brazilians and the Jam to be from the gringa! I believe I have understood, however sometimes it is not clear. So I can't use variants of blue or red, like lighter shades of the same,in the case if I choose green and yellow, I cannot use light yellow for example. If that's the case I understand!!!! Sorry my english, is bad boy!