Comparison
Realtime Colors vs ColorUI
Realtime Colors went viral for one excellent idea: see your palette applied to a fake landing page in real time. ColorUI ships the same live preview (we call it Preview Studio) plus a full toolkit around it — generator, picker, contrast, color-blindness fixer, design-token export and a public API.
When ColorUI wins
- You need to actually generate the palette, not just preview one.
- You want OKLCH, APCA contrast or color-blind safety checking.
- You export to CSS / Tailwind / Style Dictionary or W3C tokens.
- You want more than one mockup template — ColorUI ships ten.
When Realtime Colors wins
- You only need the single landing-page mockup and nothing else — Realtime Colors is the lightest possible UI for that one job.
Feature matrix
Preview
Live preview on mock landing
Yes
Yes
Tie
Number of mockup templates
10 (landing, dashboard, mobile, brand)
1
ColorUI
Side-by-side compare two palettes
Yes (Palette Diff)
No
ColorUI
Color science
OKLCH
Yes
No
ColorUI
APCA contrast
Yes
No
ColorUI
WCAG contrast
Yes
Limited
ColorUI
Color-blindness sim + fix
Yes
No
ColorUI
Generation & export
Palette generator
Yes
No
ColorUI
AI prompt generation
Yes
No
ColorUI
Generate from image
Yes
No
ColorUI
CSS / Tailwind / tokens export
Free
CSS only
ColorUI
Recommendation
Realtime Colors is a beautiful single-purpose tool. ColorUI does the live preview and ten more jobs you will need on the same project — so you stop tab-hopping.
Other comparisons
ColorUI vs Coolors
ColorUI vs Coolors compared feature-by-feature in 2025: palette generator, OKLCH support, contrast checks, exports, pricing, privacy. Pick the right tool.
ColorUI vs Adobe Color
ColorUI vs Adobe Color compared in 2025. Color wheel, harmony rules, accessibility, gradients, exports and Creative Cloud lock-in — pick the right tool.
ColorUI vs Khroma
Khroma trains an ML model on 50 colors you like, then generates only those. ColorUI offers free AI prompt generation plus accessibility and exports.
ColorUI vs Huemint
Huemint generates palettes via a transformer model. ColorUI offers AI generation plus accessibility, modern color science, and a public API.