Did you find that green and brown M&Ms are each made up of two dyes whereas blue, yellow, and red M&Ms only use one dye? Did some of these dyes match the ones from the red, blue and green food ...

In the example below, red, blue and yellow are three pure substances. The sample on the left is a mixture of all three.

The water carries some parts of the ink components further than others, and the colors separate out into a range of colors. Different brands use different combinations of ink to produce their black ...

In this chromatogram, the brown ink is made of a mixture of the red, blue and yellow inks.

In the ink: why are blue highlighter markers less bright than others? Blue fluorescent markers are less bright than green and yellow ones. The reasons, say readers, are to do with our eyes as well ...