About Color Contrast Checker Tool

Simply put, contrast is the difference between two colors. The farther apart they are from each other, the higher the contrast. Therefore, complementary combinations will have the strongest contrast, while analogous combinations will have the weakest.

Contrasting colors, also known as complementary colors, are colors from opposite segments of the color wheel. Colors that are directly across one another on the primary color wheel provide maximum contrast

Color contrast ratio refers to the difference between the light levels in the foreground and the background, a measure of contrast in web accessibility.

Due to the fact that colors are generated using unique codes on the Internet, we are able to accurately compare and analyze those codes off each other, resulting in a ratio

Sometimes after spending a long time in the sun or being fatigued from using computer or mobile, your eyes yearn for a contrasted screen or inversion of color.

Color blind people can often become sensitive to certain colors or shades of light, and even experience physical pain when the color of the text and the background of the page they are looking at, have no contrast.

The contrast between white and black is the highest and safest level of contrast between the two colors. But sometimes, depending on the situation, you may not want to use these two colors and may need two other colors that have the best contrast for the comfort of the eyes.

The use of complementary colors on the Web is about finding shades that provide enough contrast between the content and the background for people with low vision impairments or color deficiencies.

The colors should not only be limited to contrasting colors but instead there should be a level of contrast in body text, logos, and essential diagrams or other pieces of content.

The World Wide Web Consortium (W3C) developed the Web Content Accessibility Guidelines (WCAG) in collaboration with people and organizations from around the world, with the goal of providing a single shared standard for web content accessibility that meets the needs of individuals, organizations, and governments internationally

WCAG describes how web content can be made more accessible for people with disabilities.

Web “content” generally refers to the information in a web page or web application, including: -natural information such as text, images, and sounds
-code or markup that defines structure, presentation, etc.

In WCAG2.0, the Color Contrast Standard describes set up of requirements for AA & AAA conformance levels.
The minimum contrast ratio for normal sized text is 4.5:1 in compliance with the Web Content Accessibility Guidelines (WCAG).
The contrast between two colors is measured by a grade system known as "levels of conformance". The strongest possible grade is AAA, and this is achieved with a contrast ratio of 7:1. W3C states that although it is not always possible to achieve the highest level of conformance across an entire website, the goal should be to achieve the highest level of conformance in critical areas throughout a site, including headlines and body text.
So:
-Section 1.4.3 Contrast (Minimum): Level AA
For body, subtext, or general copy, the goal is a contrast ratio of approximately 4.5:1.
For headers or larger text (Font size 18pt or 14pt bold), the goal is a contrast ratio of approximately 3:1

-Section 1.4.6 Contrast (Enhanced): Level AAA
Recommended for an expected audience that has aged or low vision.
For body text, the contrast ratio can be enhanced from 4.5:1 to 7:1

Color Contrast Checker is a tool that tests the contrast ratio of your background and text for accessibility. It will also indicate if the colors pass the newer WCAG 2.0 contrast ratio formula. You can use color contrast checker to determine whether or not your color combinations are accessible or not.
Dopely’s Color Contrast Checker helps you determine accessibility of your text size, color contrast, and spot checks your visual elements.

We evaluate your color combination based on WCAG guidelines for contrast accessibility.

If your combination does not meet the guidelines, we find the closest combination that meets the guidelines by modifying the color lightness. To keep the color as consistent as possible, we only modify the lightness value.

To get started with this tool, you can click on the camera icon and select the photo you want.

There are two options for doing this:
1. Select “Image to color” and then select or drop image
2. Enter the URL

Or you can manually enter your desired color code (hex) in “Background Color” and “Text Color” fields. Sometimes, it is more convenient to enter color values by hand.

In the next step, you can adjust the contrast of your text using the roller in Hue, Saturation and Lightness parts.
After each adjustment, check the Contrast Ratio for Large text and Normal text.
-If a blue check is placed next to each component, the Contrast Ratio of your text is OK.
-If a red X is placed next to each component, the Contrast Ratio of your text is not OK.