ss="multi-line-signature">
      <span class="returntype"><a href="dart-core/double-class.html">double</a></span>
            <span class="name ">computeLuminance</span>
(<wbr>)
      
    </section>
    <section class="desc markdown">
      <p>Returns a brightness value between 0 for darkest and 1 for lightest.</p>
<p>Represents the relative luminance of the color. This value is computationally
expensive to calculate.</p>
<p>See <a href="https://en.wikipedia.org/wiki/Relative_luminance">en.wikipedia.org/wi