Check Your Color Contrast

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Your Contrast Results

Enter your text color and background color above to see if your color combination is accessible and compliant for those with visual impairments.

Your ratio is undefined:1. Your colors meet WCAG requirements. GREAT.

Small text compliance level AA fail. Small text compliance level AAA fail.

Large text compliance level AA fail. Large text compliance level AAA fail.

Your Compliance

Small Text

Level AA


Level AAA


Large Text

Level AA


Level AAA


Graphics & UI Components

Level AA


Preview Colors in Grayscale

Contrast Ratio Scale


Your Ratio








Color Contrast Checker

Get full access to ensure you're color combinations are accessible.

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Website Accessibility Checker

Find out if your site is accessible for people with disabilities and meets the ADAWCAG, and other requirements.

How Does a Color Contrast Checker Work?

Color contrast — which is the difference in color between two elements —  influences how well users read and navigate a website. For users with visual impairments, including low vision, cataracts, or color blindness, color contrast significantly influences their experience. The lower the contrast, the more difficult it can be for these individuals to navigate a page.

A color contrast checker ensures web pages are accessible by determining whether they meet WCAG color contrast requirements.

Understanding Contrast Ratios

WCAG has two levels of contrast ratios :

  • Level AA: The minimum contrast level is 4.5:1. 
  • Level AAA: Enhanced contrast has a ratio of 7:1. 

It’s recommended organizations provide higher-contrast text and images where possible; however, Level AA is the required standard for website accessibility.

Here’s the bottom line: the more contrast you have between your text and UI elements and background colors, the more accessible it is for everyone.

Try our tool below to test colors' contrast.

Tips on Using Accessible Colors and Color Contrast on Your Website

Poor contrast results with two web pages open, one in full color and one in low color

Choose the Right Color Scheme

A color scheme is a combination of hues that are implemented in specific design contexts, such as a site’s layout. Color plays an important role in making your content accessible to people with visual impairments. Web color accessibility in design considers your audience and any condition or disability they may have in perceiving pigmentation.

When it comes to creating an accessible website, color choice matters. Including accessible hues in your design palette will make your site more usable to people who may have vision impairment or low vision.

The Web Content Accessibility Guidelines (WCAG) outline various recommendations for color accessibility, including guidance for color contrast ratios, luminance, backgrounds, and color spacing in order to make a site more accessible to those with any type of vision deficiency. The following aspects of website color schemes can help you design with accessibility in mind.

Aim for a ratio hire than 4.5:1 for best results

Aim For a Contrast Ratio of 4.5:1 or Higher

A color contrast ratio determines how bright or dark colors appear on a screen. They can range from 1 to 21 (written as 1:1 and 21:1, respectively). The first number in the ratio indicates the relative luminance (or brightness) of the light colors, and the second represents the relative luminance of dark colors. WCAG recommends using 4.5:1 as the minimum ratio for text and interactive elements.

Want an accessible website but don't know where to start?

Illustration of ebook cover, with the title "accessible web design: How to make ADA-compliant websites." The ebook has a pattern of icons faintly spanning the dark purple cover, with web browser icons, cursor icons, and arrows pointing in different directions fitting together in a complex pattern. 3 browser icons are popping off of the book cover and floating on top of the ebook.

Want an accessible website but don't know where to start?

Read our comprehensive guide to understand accessible web design, why it's important, and how to apply best practices to your business.

Download Guide

Find Visually Friendly Color Combinations

Choose color combinations by focusing on background colors, text and typeface colors, calls to action (CTAs), and buttons.

Here’s a few dos and don’ts to help:


  • Start the process by identifying your primary brand color
  • Remember certain colors tend to hold certain meanings
  • Aim for more white space to help boost readability
  • Use varying saturations of your brand’s main hues to increase brand loyalty


  • Let a color combination get in the way of readability
  • Use low-contrast text — it can strain the eyes and make your page less accessible 
  • Use a digital black typeface or pure black on a pure white background — the stark contrast may cause eye strain

Remember additional factors such  screen resolution, brightness levels, and device types also affect site readability. Test colors on various platforms to ensure they’re adjusted for optimal readability on different devices.

Know the Color Contrast Accessibility Exceptions

There are some exceptions to the color accessibility guidelines outlined by WCAG:

  • Color contrast ratio requirements are not mandated for logos or incidental graphic elements because they are not necessarily essential for the user to understand the content or functionality.
  • Text that is part of a logo does not have a minimum contrast requirement.
  • Text that is part of disabled buttons does not need to meet the minimum contrast ratio. While there are a few exemptions, try your best to follow best practices to avoid any accidental violations of color accessibility in web design.

Want to learn more about color contrast and its impact on the user experience?

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Frequently asked questions

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