color-contrast.html

<div id="pass1" style="background-color: white; color: black">
  This is a pass.
</div>
<div id="pass2" style="background-color: gray; color: white; font-size: 40px">
  This is a pass.
</div>
<div
  id="pass3"
  style="
    background-color: gray;
    color: white;
    font-size: 20px;
    font-weight: bold;
  "
>
  This is a pass.
</div>

<div style="background-color: black">
  <div
    style="color: transparent; text-shadow: 0 0 0 white"
    id="text-shadow-fg-pass"
  >
    Pass.
  </div>
</div>

<div id="fail1" style="background-color: gray; color: white; font-size: 20px">
  This is a fail.<b id="pass4">But this is a pass.</b>
</div>

<div style="background-color: black">
  <div
    style="background-color: rgba(255, 255, 255, 0.1); color: white"
    id="pass5"
  >
    Pass.
  </div>
</div>

<div style="position: relative; height: 40px">
  <label style="background-color: black; color: white" id="pass7">
    Label
    <input style="position: absolute; top: 20px" />
  </label>
</div>

<div
  id="pass8"
  style="color: #000; background: #737373; text-shadow: white 0 0 3px"
>
  Hello world
</div>

<div id="fail2" style="background-color: gray; color: white; font-size: 8px">
  This is a fail.
</div>
<div id="fail3" style="background-color: yellow; color: white; font-size: 40px">
  This is a fail.
</div>

<div style="background-color: white">
  <div id="fail6" style="opacity: 0.1; background-color: white; color: black">
    This is a fail.
  </div>
</div>

<div
  id="fail7"
  style="color: #000; background: #777; text-shadow: black 0 0 0.2em"
>
  Hello world
</div>

<!-- shouldnt run -->
<input
  id="ignore0"
  style="background: #000; color: #000"
  value="hello"
  type="hidden"
/>
<input
  id="ignore1"
  style="background: #000; color: #000"
  value="hello"
  type="radio"
/>
<input
  id="ignore2"
  style="background: #000; color: #000"
  value="hello"
  type="checkbox"
/>
<input
  id="ignore4"
  style="background: #000; color: #000"
  value="hello"
  type="hidden"
/>
<select id="ignore5" style="background: #000; color: #000"></select>

<div
  id="ignore6"
  style="
    color: yellow;
    width: 100px;
    overflow: hidden;
    text-indent: 200px;
    background-color: white;
  "
>
  text
</div>

<label for="disabled1">Hello</label>
<input id="disabled1" disabled />
<div id="disabled2">Hello</div>
<input aria-labelledby="disabled2" disabled />
<div
  id="disabled3"
  style="background: #000; color: #000"
  role="alert"
  aria-disabled="true"
>
  hello
</div>
<label style="color: #fff" id="disabled4">
  Test
  <input type="text" disabled />
</label>

<div
  style="
    background-image: url(data:image/gif;base64,R0lGODlhEAAQAMQAAORHHOVSKudfOulrSOp3WOyDZu6QdvCchPGolfO0o/XBs/fNwfjZ0frl3/zy7////wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAkAABAALAAAAAAQABAAAAVVICSOZGlCQAosJ6mu7fiyZeKqNKToQGDsM8hBADgUXoGAiqhSvp5QAnQKGIgUhwFUYLCVDFCrKUE1lBavAViFIDlTImbKC5Gm2hB0SlBCBMQiB0UjIQA7);
  "
>
  <div style="color: white" id="canttell1">Background image</div>
</div>

<div style="height: 40px; position: relative">
  <div
    style="
      background-color: white;
      height: 60px;
      width: 40px;
      border: 1px solid;
    "
  >
    <div
      id="canttell2"
      style="color: white; height: 40px; width: 60px; border: 1px solid red"
    >
      Outside parent
    </div>
  </div>
</div>

<div style="background-color: white; height: 60px; width: 40px">
  <div id="canttell3" style="color: white; height: 40px; width: 60px">
    Background overlap
  </div>
</div>

<div
  style="
    background-color: white;
    height: 60px;
    width: 80px;
    border: 1px solid;
    position: relative;
  "
>
  <div
    id="canttell4"
    style="color: white; height: 40px; width: 60px; border: 1px solid red"
  >
    Element overlap
  </div>
  <div
    style="
      position: absolute;
      top: 0;
      width: 60px;
      height: 40px;
      background-color: #000;
    "
  ></div>
</div>
<div style="background-color: white">
  <div
    style="background-color: rgba(255, 255, 255, 0.1); color: white"
    id="canttell5"
  >
    1:1 ratio with transparency
  </div>
</div>

<input
  id="canttell6"
  style="background: #000; color: #000"
  value="hello"
  type="text"
/>
<input
  id="canttell7"
  style="background: #000; color: #000"
  value="hello"
  type="button"
/>
<input
  id="canttell8"
  style="background: #000; color: #000"
  value="hello"
  type="submit"
/>
<input
  id="canttell9"
  style="background: #000; color: #000"
  value="hello"
  type="reset"
/>
<select id="canttell10" style="background: #000; color: #000">
  <option>Hello</option>
</select>
<textarea id="canttell11" style="background: #000; color: #000">hello</textarea>
<input
  id="canttell12"
  type="button"
  style="background: #000; color: #000"
  value="hello"
/>
<input
  id="canttell13"
  type="reset"
  style="background: #000; color: #000"
  value="hello"
/>
<input
  id="canttell14"
  type="submit"
  style="background: #000; color: #000"
  value="hello"
/>
<input id="canttell15" style="background: #000; color: #000" value="hello" />
<div
  id="canttell16"
  style="background: #000; color: #000"
  role="alert"
  aria-disabled="false"
>
  hello
</div>

<div id="canttell17" style="background: #000; color: #000" aria-hidden="true">
  text
</div>

<div style="background-color: white; height: 60px; width: 80px">
  <div id="canttell18" style="color: white; height: 40px; width: 60px">Hi</div>
</div>

<div
  style="background-color: white; height: 60px; width: 80px; overflow: scroll"
>
  <div
    id="canttell19"
    style="margin-left: 80px; color: white; height: 80px; width: 90px"
  >
    Hi
  </div>
</div>

<div style="background-color: #fff">
  <div id="canttell20" style="color: #ddd">
    &#x20A0; &#x20A1; &#x20A2; &#x20A3;
  </div>
</div>

<div style="width: 0; height: 50px; overflow: scroll">
  <div id="ignore7" style="width: 200px; height: 200px; background-color: blue">
    Hello World
  </div>
</div>

<p
  style="
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    max-width: 200px;
    background-color: #fff;
  "
>
  <span id="pass9" style="color: #000">
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed et sollicitudin
    quam. Fusce mi odio, egestas pulvinar erat eget, vehicula tempus est. Proin
    vitae ullamcorper velit. Donec sagittis est justo, mattis iaculis arcu
    facilisis id. Proin pulvinar ornare arcu a fermentum. Quisque et dignissim
    nulla, sit amet consectetur ipsum. Donec in libero porttitor, dapibus neque
    imperdiet, aliquam est. Vivamus blandit volutpat fringilla. In mi magna,
    mollis sit amet imperdiet eu, rutrum ut tellus. Mauris vel condimentum nibh,
    quis ultricies nisi. Vivamus accumsan quam mauris, id iaculis quam fringilla
    ac. Curabitur pulvinar dolor ac magna vehicula, non auctor ligula dignissim.
    Nam ac nibh porttitor, malesuada tortor varius, feugiat turpis. Mauris
    dapibus, tellus ut viverra porta, ipsum turpis bibendum ligula, at tempor
    felis ante non libero.
  </span>
</p>

<div
  id="text-container"
  style="
    overflow: hidden;
    background-color: teal;
    height: 30px;
    width: 200px;
    margin-bottom: 60px;
  "
>
  <span id="fail8" style="color: grey"
    >this is a span with some text inside of it</span
  >
  <span id="fail9" style="color: grey"
    >this is a span with some text inside of it</span
  >
  <span id="ignore8" style="color: grey"
    >this is a span with some text inside of it</span
  >
  <span id="ignore9" style="color: grey"
    >this is a span with some text inside of it</span
  >
</div>

<details>
  <summary id="pass10">Summary</summary>
  <span id="ignore10">Some text</span>
</details>

<details open>
  <summary id="pass11">Summary</summary>
  <span id="pass12">Some text</span>
</details>

<div style="background: #222">
  <div
    style="
      background-color: white;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 300px;
    "
  >
    <span id="pass13"
      >Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
      veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
      commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
      velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
      cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id
      est laborum.</span
    >
  </div>
</div>

<div style="background-color: #222; height: 40px; width: 100px"></div>
<div style="margin: -40px 0 40px" id="fail10">Hello world</div>

<div
  style="
    overflow: hidden;
    width: 300px;
    height: 200px;
    background: #222;
    margin-bottom: 150px;
  "
>
  <div style="overflow: hidden; position: relative; left: 100px">
    <div id="fail11" style="position: relative; top: 100px">
      Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
      veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
      commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
      velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
      cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id
      est laborum.
    </div>
  </div>
</div>

<ul>
  <li id="pass14">
    Lorem
    <ul>
      <li id="pass15">Ipsum</li>
    </ul>
  </li>
</ul>

<ul style="font-size: 14px; line-height: 1.6em">
  <li id="pass16">
    Test
    <ul>
      <li></li>
    </ul>
  </li>

  <li id="pass17">
    Lorem <strong id="pass18">ipsum</strong>.
    <ul>
      <li></li>
    </ul>
  </li>
</ul>

<label id="pass19"
  >Do you like peas?
  <input id="pass20" name="peas" style="width: 100%" />
</label>

<p style="color: #ccc; -webkit-text-stroke: 0.03em #444" id="pass21">
  Text-stroke 0.03em
</p>
<p style="color: #ccc; -webkit-text-stroke: 0.02em #444" id="fail12">
  Text-stroke 0.02em
</p>

<div
  id="backdrop"
  style="
    position: absolute;
    z-index: 1;
    height: 40px;
    background: #333;
    width: 100%;
  "
></div>
<div style="display: flex">
  <div style="background: white; z-index: 1">
    <span id="pass22">This div will be on top of the stack</span>
  </div>
</div>

<div id="ignore11" style="background: #000; color: #333" inert>hello</div>

<div inert>
  <div>
    <div id="ignore12" style="background: #000; color: #333">hello</div>
  </div>
</div>

<div
  id="pass23"
  style="
    color: #000;
    background: #737373;
    text-shadow: color(display-p3 1 1 1 / 1) 0 0 3px;
  "
>
  Hello world
</div>