Before you mix anything, you need to decide what your blue is made of. Light-based “blue” is what you see on a screen or through a beam of light. Pigment-based “blue” is what you get when you mix paints, inks, or dyes. Digital “blue” is a set of values that a device turns into light for your eyes.
This matters because mixing rules change. Light mixing is usually described by additive color (colors add together to create brighter results). Pigment mixing is usually described by subtractive color (pigments absorb parts of light, so combinations can look different than you expect).
Two-color answers vary by the mixing system
So when someone asks what 2 colors make blue, they might be really asking one of these:
- “What two colors of light create a blue tone?”
- “What two pigments make a blue color?”
- “What two input colors in a digital system combine to produce blue?”
Each question has a different “two-color” pairing that’s considered correct in its own system.
