Question

which colours can we mix to make black colour ...................?​

Answer 1

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The primary colors of light are red, green, and blue. If you subtract these from white you get cyan, magenta, and yellow. Mixing the colors generates new colors as shown on the color wheel, or the circle on the right. Mixing these three primary colors generates black.

Answer 2

Answer:

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If you combine two primary colors with each other, you get a so-called secondary color. If you mix red and blue, you get violet, yellow and red become orange, blue and yellow become green. If you mix all the primary colors together, you get black.