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Adjust text and background colours while checking their contrast.

Build colour tools with JavaScript objects, conversions and gamut controls.

Generate a chosen number of shades and copy their values.

Work with colour spaces and colour relationships in Go.

Use colour-science tables with explicit sampling, metadata and citations.

Build an eleven-step scale and export variables for a web project.

Edit a colour system in perceptual coordinates and copy design tokens.

Preview webpage colours through eight simulation modes in Chrome.

Control gradient colour positions and the transitions between them.

Build CSS gradients while exploring different colour spaces.

Choose numbered shades whose separation indicates minimum contrast.

Choose scientific colour maps to match the structure of your data.

See curated palettes applied to page elements and copy their hex codes.

Adjust CSS colour pairs and inspect their changing contrast ratio.

See how a colour pair performs for different text sizes.

CC0 photography with subject and colour browsing

Five-colour palettes drawn from named paintings and their artists

Convert colours between spaces and control their CSS output.

Choose a starting colour and explore a related scheme.

Preview colour-vision differences through a screen filter or phone camera.

Balance shots, refine a reference match and return the grade to your edit.

Create device-specific colour profiles and check display consistency.

A compact SVG set controlled through stroke properties.

Measure displays, generate colour-correction tables and verify the result.