What does blue and green make?

Equal amounts of blue and green mixed together produce the color Cyan. Cyan is one of the three secondary colors on the additive color model of Red, Green and Blue, known as RGB.

The subtractive model of primary colors are red, yellow and blue, or RYB. These colors are not produced by mixing with any other colors. All colors are produced by a combination of the three primary colors. Secondary colors are produced by mixing equal amounts of adjacent pairs of primary colors. The secondary colors are orange, purple and green. Mixing the secondary colors in turn produces tertiary colors.