I need help on my arts

so i think you are trying to make black or gray

Explanation:

mix all the colors and keep adding them until you get black or gray

example:

1.red should go with pink=...

2.violet goes with brown=...

then add the  two results of those colors together with a little bit of black and keep adding black untinl you get gray

i'm not too sure - if you could attach the picture