Reasonable Colors
reasonable.workChoose numbered shades whose separation indicates minimum contrast.
Choose numbered shades whose separation indicates minimum contrast.
Build measured colour profiles with a documented command-line toolkit.
Choose scientific colour maps to match the structure of your data.
Share colour configurations and transforms across visual production tools.
Historical and fine-art imagery with detailed people and artwork searches
Map twelve-step colour scales to interface roles and light or dark themes.
See curated palettes applied to page elements and copy their hex codes.
Tré Seals’s retail fonts shaped by protest signs, newspapers and cultural history.
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.
CC0 photography with subject and colour browsing
Convert colours between spaces and control their CSS output.
Find replacement colours that meet a chosen contrast target.
Medical-history images from the fifteenth century onward
Historical footage with per-clip licences and full-resolution screeners
Art and historical images with project-specific licensing
Choose a starting colour and explore a related scheme.
Historical photographs, maps and printed images with individual rights statements
Historical picture research with media-number search and per-use licensing
Cultural and historical imagery with complimentary picture research
A searchable reference to historical markers and memorials
Historical maps with text search and geographic viewing tools
Preview colour-vision differences through a screen filter or phone camera.