How many colors should a theme use?

One primary, one or two accents, and a short neutral ramp. More colors usually mean weaker branding.

What contrast ratio should I aim for?

Follow WCAG-minded contrast for text on backgrounds—especially for slides projected in bright rooms.

Themesei

Updated August 25, 2026 6 min read

A color theme is the backbone of presentation themes, Shopify accents, and browser frames.

Use generators like Coolors and Realtime Colors, plus accessibility helpers such as WebAIM Contrast Checker.

Export hex values into Google Slides Theme colors, PowerPoint Slide Master, or Shopify brand settings.

How many colors should a theme use?: One primary, one or two accents, and a short neutral ramp. More colors usually mean weaker branding.
What contrast ratio should I aim for?: Follow WCAG-minded contrast for text on backgrounds—especially for slides projected in bright rooms.