What Does Red and Green Make? – Inside Colors
File:Additive color mixing red and green.jpg - Wikimedia Commons
What Are Complementary Colors?
Colours of light — Science Learning Hub
Everything about the color Red Orange
What Color Does Red and Green Make When Mixed Together? – CreativeBooster
Color Basics
Color mixing and colour vision: Physclips - Light
Color wheel - color theory and calculator
Molecular Expressions: Science, Optics, and You: Light and Color - Primary Colors
Defining Warm and Cool Colors: It's All Relative