Do I need an account to use the tools?

No. The site states its tools are free, require no account, and will stay free.

What information does a colour page show?

Conversions to rgb, hsl, hsv, cmyk and CIE spaces, harmonies, shades and tints, contrast against white and black, nearest RAL and Pantone, and colour vision deficiency simulations.

How accurate are the contrast figures?

They use the WCAG formula rather than an approximation, and any approximated result is labelled with an explanation.

Online Color Tools

Free colour lookup with conversions, harmonies, contrast checks and 22 colour tools for designers, no account needed.

Category:

Design Assets

Maker:

Bettie M. Cobb

Use Cases

Portfolio

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About Online Color Tools

HexColor.co is a free colour reference and toolkit for designers. Entering a hex code, an rgb value or a browser colour name opens a dedicated page for that colour showing conversions into rgb, hsl, hsv, cmyk and CIE spaces, colour harmonies, shades and tints, contrast against white and black, the nearest RAL and Pantone matches, and simulations of how the colour appears under different colour vision deficiencies.

Alongside the colour encyclopedia, the site offers 22 free tools grouped by task: palette and scheme generators, a colour picker and converter, shade, gradient and mixing tools, extractors that pull palettes from images, websites or brands, and a contrast checker and colour blindness simulator. Values are computed from definitions, contrast uses the WCAG formula, and approximations are flagged. Pages are built to load in tens of milliseconds.

No account is needed, and the site runs on ads. The one paid product is Palette Studio, which packages a full design system as Tailwind config, CSS variables, SCSS and design tokens with dark mode and WCAG contrast handled. The site has operated since 2016 and also hosts a blog on colour theory, branding and psychology.

Best for

Designers checking colour values and conversions
Developers testing WCAG contrast
Marketers building brand palettes
Teams needing design tokens via Palette Studio

Pros

22 tools free with no account required
Per-colour pages with conversions, harmonies, RAL and Pantone matches
Contrast uses the actual WCAG formula
Colour blindness simulation built into every colour page

Cons

Site displays ads, including unrelated third-party promotions
Design system export requires the paid Palette Studio

Pricing

All 22 tools and colour pages are free with no account; Palette Studio is the only paid offering, with no price stated.

Online Color Tools FAQ

Do I need an account to use the tools?: No. The site states its tools are free, require no account, and will stay free.
What information does a colour page show?: Conversions to rgb, hsl, hsv, cmyk and CIE spaces, harmonies, shades and tints, contrast against white and black, nearest RAL and Pantone, and colour vision deficiency simulations.
What is Palette Studio?: The site's one paid product, which exports a whole design system as Tailwind config, CSS variables, SCSS and design tokens with dark mode and WCAG contrast handled.
How accurate are the contrast figures?: They use the WCAG formula rather than an approximation, and any approximated result is labelled with an explanation.