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Preview webpage colours through eight simulation modes in Chrome.

Control gradient colour positions and the transitions between them.

Bring an existing set of colours together with a shared tint.

Build CSS gradients while exploring different colour spaces.

Browse public NASA data APIs and use a shared key service for application access.

Australian scientific history connected to archival sources

AI learning platform that builds a personalized curriculum for any subject

AI study platform with 25+ tools for essays, math, and science

Choose colours with saturation scaled to the available RGB range.

Choose numbered shades whose separation indicates minimum contrast.

Build measured colour profiles with a documented command-line toolkit.

Share colour configurations and transforms across visual production tools.

The American Museum of Natural History's science website for children, with reading, games and hands-on activities.

A hosted notebook editor for Python and data work, with SQL cells, collaboration, and interactive reports.

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

A handbook for reproducible and collaborative data science

Adjust CSS colour pairs and inspect their changing contrast ratio.

Browse compact four-colour combinations with visible hex values

See how a colour pair performs for different text sizes.

A Python IDE for creating, running, and debugging projects, notebooks, and data applications.

Learning games covering geography, animals, maths, language arts and science.

Science stories with cultural and human context

Research news across life, space and physical science

Science and society through reported digital features