Alternatives to ColorBox
A web tool for building accessible color scales from adjustable hue, saturation and brightness curves. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
ColorBox
A web tool for building accessible color scales from adjustable hue, saturation and brightness curves.
Replacements
Listings that take over the same core job as ColorBox.
Leonardo
Adobe's web tool for generating accessible color themes and scales from target contrast ratios.
Leonardo is open source and builds scales from target contrast ratios, with adaptive dark mode themes and exports to CSS, Design Tokens and SVG.
Geenes
A browser tool for building color scales and exporting them to Sketch or code.
Geenes also builds scales from hue and saturation curves but exports only to Sketch or code and has little public documentation.
Huetone
An open-source web tool for building predictable, accessible color palettes in the LCH color space.
Huetone is open source and builds accessible palettes in the LCH color space, keeping lightness consistent across hues.
Accessible Palette
A web tool for building color systems with consistent lightness and WCAG contrast across hues.
Accessible Palette keeps perceived lightness consistent across hues and shows WCAG 2 and 3 contrast, but its export options are not described.
Scale
A web tool that generates a smooth color scale from a single base color.
Scale generates a tint and shade scale from one base color with hue and saturation curves, but offers little documentation and no stated contrast display.
tints.dev
A web palette generator and API that builds 11-shade Tailwind CSS color scales from one base color.
tints.dev builds 11-shade Tailwind scales from one base color with an API and shareable URLs, with less fine channel control than easing curves.
UI Colors
A web tool that generates Tailwind CSS color shade scales from a base color and previews them.
UI Colors generates Tailwind shade scales previewed on shadcn/ui components and adds neutral and status scales, with some features requiring Pro.
Atmos
A web-based color palette generator for UI designers, with shade scales and accessibility checks.
Atmos generates uniform shade scales plus semantic status colors and harmony modes, and is freemium with some features possibly needing an account.
Also worth comparing
These listings name ColorBox as their own alternative, so the relationship runs both ways.
Palettte App
A web app for creating, editing and remapping color palettes with hue, saturation and value controls.
ColorBox controls each channel with easing curves to build systematic scales with contrast ratios and Tailwind, OKLCH and Swift export.
Similar software
Related functionality, not a direct replacement.
Material Theme Builder
Google's web tool for generating Material Design 3 color schemes from a source color.
OKLCH Color Picker
A web color picker and converter for the OKLCH color space with P3 and Rec2020 views.
WebAIM Contrast Checker
An online checker that tests foreground and background color contrast against WCAG AA and AAA levels.
Realtime Colors
A web tool that previews a color palette and font pairing on a realistic page layout as you edit it.
