All Tools
Professional Colour Tools
Free, scientific colour analysis tools used by designers and developers worldwide. No sign-up required - just pick a tool and start creating.
100% Free
No credit card required
Scientific
LAB-based calculations
Professional
Industry standards
Colour Harmony Generator
Create beautiful, harmonious colour palettes using scientific colour theory
- 9 harmony types
- Interactive colour wheel
- Export palettes
Open Tool
Accessibility Checker
Ensure your colours meet WCAG standards and work for everyone
- WCAG 2.1 & 3.0
- APCA calculations
- Contrast checker
Open Tool
Colour Blindness Simulator
See how colours appear to people with different types of colour vision deficiency
- 8 vision types
- Severity control
- Palette testing
Open Tool
Advanced Colour Picker
Professional colour picker with multiple colour space support
- RGB, HSL, LAB
- Live preview
- Copy formats
Open Tool
Palette Builder
Build, test, and refine colour palettes for your projects
- Drag & drop
- Real-time preview
- Share palettes
Open Tool
Delta-E Calculator
Calculate perceptual colour differences with scientific precision
- Delta-E 2000
- Batch comparison
- Visual analysis
Open Tool
Palette CVD Analyzer
Advanced CVD analysis for entire palettes with safety scoring and alternatives
- CVD safety scores
- Problematic pairs
- Alternative generation
Open Tool
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