Color.review
Explore accessible foreground and background colors with Color.review, which displays contrast measurements.
About Color.review
Color.review is a browser-based tool for exploring foreground and background color combinations and measuring the contrast between them. It reports the current contrast ratio and checks it against the WCAG 2.1 thresholds the site uses: AA requires 4.5 for text and at least 3 for headlines and large text, while AAA requires 7 for text and 4.5 for headlines and large text. Interface elements that are not currently active, such as buttons and sliders, need a contrast of at least 3. Colors can be entered and read out in hex, RGB, HSL, CMYK and CSS, and a specific color pair can be shared through a direct link such as color.review/check/293845-FFFFFF.
Key features
- Measures the contrast ratio between a chosen foreground and background
- Checks pairs against WCAG 2.1 AA and AAA contrast levels
- Lists thresholds for text, headlines, large text and inactive interface elements
- Shows color values in hex, RGB, HSL, CMYK and CSS
- Flip control swaps the foreground and background colors
- Random background color and direct links to a specific pair
Best for: Designers and developers who need to check whether chosen text and interface colors meet WCAG 2.1 contrast levels.
Good for
- Uses the WCAG 2.1 standard and distinguishes AA from the stricter AAA level
- Covers text, headlines, large text and inactive interface elements such as buttons and sliders
- Supports several color notations, including hex, RGB, HSL, CMYK and CSS
Watch out for
- Contrast is evaluated against WCAG 2.1 as stated on the homepage; no later standard version is mentioned
- Swatches and an eyedropper are described only as features of an app that visitors are invited to be first to try, not as part of the current tool
Color.review at a glance
- Website
- color.review
- Category
- Design & Creative › Color Tools
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Color Tools
Color.review alternatives
Tools and sites you could use instead, ranked by how closely they match.
Evaluate a brand color palette for ADA compliance with the Accessible Brand Colors tool.
color × color creates accessible color systems for user interfaces using Okhsl or HSLuv color spaces.
Generate color values for design systems by setting a target contrast ratio.
Open source
24 alternatives
Generate translucent color equivalents with Alphredo by adjusting a palette against a chosen background.
hue.tools mixes and modifies colors, shows combinations, and links colors to design inspiration and stock imagery.
FreePick
24 alternatives
PaletteMaker creates color palettes and previews them in sample designs such as logos, interfaces, patterns, and posters.
Free
24 alternativesPopular in Color Tools
Well-known listings from the same topic.
accessiblepaletteaccessiblepalette.comAdobe Colorcolor.adobe.comCoolorscoolors.coColor Pickerimagecolorpicker.comSchemeColorschemecolor.comRealtime Colorsrealtimecolors.com
Color.review FAQ
What contrast ratio does WCAG AA require?
Under the AA level described on the site, text requires a contrast of 4.5, while headlines and large text need at least 3.
What counts as large text?
Large text is defined as 14 point (typically 18.66px) and bold or larger, or 18 point (typically 24px) or larger.
What does the stricter AAA level require?
AAA requires 7 for text; for headlines and large text the minimum is 4.5.
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.