What color can be added to gray to make black?

Answer 1

Mix red and yellow and some blue if it turns pink then add more blue if it turns blue add more yellow and if it is a greenish color add red it is a trial and error process use white at this point to lighten to your desired shade. A little red goes a long was same with white.

Answer 2

maybe lots of blue and a tad of a golden tone of yellow...possibly?...try different things out

Answer 3

go get gray food coloring

Answer 4

you can't unless if you add black