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.

In the case of light blue paint color, I often err on two of Farrow & Ball's classic whites: School House White or the stronger shade of Off White. Both have a tiny amount of green through them ...

Red, green and blue filters each transmit a single primary ... Diffuse reflection from surfaces can also subtract colours from light. White surfaces reflect all colours of light, which is why ...