Blue

What it is

Blue has a complex history: visually common in sky and water, but historically difficult to make as a stable, vivid pigment. Its meanings range from sacred distance to corporate trust.

Basics

• Blue is a primary in RGB light and a major family in pigment history.
• Historically famous blues include Egyptian blue, ultramarine, indigo, cobalt blue, and Prussian blue.
• Blue often reads as cool, distant, calm, technical, trustworthy, or melancholic.

Notes for later expansion

• This overview should link strongly to ultramarine, Egyptian blue, Prussian blue, and lapis lazuli.
• Blue is ideal for explaining scarcity, trade, and synthetic pigment breakthroughs.

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