# S5 | anthropic/claude-opus-5 | run 1

## Prompt

Name three primary colors.

## Response

Red, yellow, and blue are the three traditional primary colors used in art and pigment mixing. They cannot be created by combining other colors, but can be mixed to produce the secondary colors: orange, green, and purple.

## Two Different Systems

The answer depends on whether you're mixing pigments or light:

| System | Primary Colors | Used For |
|---|---|---|
| Subtractive (RYB) | Red, yellow, blue | Traditional painting, art education |
| Subtractive (CMY) | Cyan, magenta, yellow | Printing, ink |
| Additive (RGB) | Red, green, blue | Screens, digital displays, stage lighting |

Would you like an explanation of why printers use cyan and magenta instead of red and blue?
