<!-- <p class="cc__brand__subtitle text-italic text-light">Color Accessibility Checker built by <a title="Go to Oomph website, link opens in a new window." target="_blank" href="//oomphinc.com">Oomph</a></p> -->
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<label class="cc__form__label" for="brand-color-field">Enter a color or list (required):</label>
<p>This tool shows three different ratio targets and how your color performs with each — white, black, or other colors in your palette:</p>
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<li><strongclass="text-light">WCAG Level AAA:</strong> a contrast ratio equal or greater than <strong>7.0</strong>. For large-scale text, a ratio equal or greater than <strong>4.5</strong>.</li>
<li><strongclass="text-light">WCAG Level AA:</strong> a contrast ratio equal or greater than <strong>4.5</strong>. For large-scale text, a ratio equal or greater than <strong>3.0</strong>.</li>
<li>Text that is considered “Large-scale” is <strong>18 points (24px)</strong> or larger or <strong>14 points (19px) and bold</strong> or larger.</li>
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<p>For more details about success criteria, see the <atitle="Go to w3 website in a new window"target="_blank"href="https://www.w3.org/TR/WCAG21/#contrast-minimum">WCAG 2.1 minimum contrast ratios</a> page.</p>
<h3>Modify with HSL</h3>
<p><strong>Why HSL?</strong> By modifying primarily the saturation and/or lightness, the original intention of the color is intact. To modify the Hue would be to start to modify the color from a blue to a blue-green, or from a red to an orange. Of course, modify the Hue as you wish as well, but our intention is to show how small movements to the saturation and lightness can increase accessibility while retaining the intention of the brand color. <ahref="https://www.nixsensor.com/what-is-hsl-color/"target="_blank">More about how HSL works</a>.</p>
<p>Be careful with <strongclass="text-light">EDGE</strong> values — the color passes validation, but is within 0.5. It may still present a legibility issue even though it gets a passing grade. </p>
<h3>Most legible Pair</h3>
<p>From the given list of colors, which color combination is the <em>most legible</em>? This does not mean that the color pair will pass minimum requirements, but it has the best chance of passing. </p>
<p><strongclass="text-light">Custom:</strong> Use the text input to change the color pairing.</p>
<h3>Check your hover text color vs. your body text color</h3>
<p>If <atitle="Go to Webaim.org, link opens in a new window."target="_blank"href="http://webaim.org/techniques/hypertext/link_text#appearance">links are not underlined</a>, there must be 3:1 contrast between link text and body text and also an additional change (e.g., underlining) on mouse hover and keyboard focus. Use the tool to compare your link color against your body text color to see how they pair in the Most Legible column.</p>
<p>ColorCube is an accessibility (<abbrtitle="">a11y</abbr>) tool aimed at designers and developers. From a list of colors, we produce performance information with common color combinations. And then we give you the tools to adjust those colors until they pass the recommended color contrast ratios.</p>
<p><strongclass="text-light">Why?</strong> At Oomph we believe a better web is an accessible web for all. We wanted a tool that could be used before a project starts — one that helps assess how an existing brand color palette performs. Starting early means that we can make adjustments early to avoid non-accessible color combinations later. </p>
<p>Corporate brand color palettes often do not take accessibility into account. And their colors are hard to change. By changing the saturation or brightness of a color <em>but not the hue</em> the color intention is preserved. Most users may not even notice that the color has been adjusted for readability.</p>
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<p><small>Made with <spanaria-title="love">❤</span> in 2017 at Oomph, Inc. Last update October, 2019. Open source project with MIT license. <atitle="Go to GitHub in a new window."target="_blank"href="https://github.com/oomphinc/colorcube">Contribute to the GitHub repo</a>.</small></p>
<p><small><strongclass="text-uppercase">Disclaimer:</strong> The algorithm used in this tool and subsequent results are based on the luminosity algorithm recommended in the WCAG 2.0 guidelines to test for contrast. This tool is for general assessment purposes only and not a guarantee of compliance. This open-source visual tool is not optimized for screen readers. </small></p>
