Complementary colors live on opposite sides of the color wheel. Imagine red and green, blue and orange, or yellow and purple. Or move a half step over on the wheel, and combine a yellow-green color ...

Red and yellow and pink and green Purple and orange and blue, I can sing a rainbow, Sing a rainbow, Sing a rainbow too. Red and yellow and pink and green Purple and orange and blue, I can sing a ...

You can use a prism to split (or disperse) white light into a spectrum of colours: red, orange, yellow, green, blue, indigo and violet. Dispersed means that the colours are separated out.