Add one drop of red food coloring into the mixing dish and mix the colors together with a toothpick. The disproportional amount of yellow will keep the coloring from turning orange, and the red will act to dull the yellow, creating a gold tint.
Which Colours make silver?
If you’re painting a picture with a silver element in it, then black and white in various proportions, as well as tinges of whatever surrounding colors giving off reflected light to silver – mixed into those proportions of black and white.