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  <main id="main" class="col-md-9"><div class="page-header">
      <img src="../logo.png" class="logo" alt=""><h1>Add alpha to hex color</h1>
      <small class="dont-index">Source: <a href="https://github.com/gadenbuie/xaringanthemer/blob/HEAD/R/color.R" class="external-link"><code>R/color.R</code></a></small>
      <div class="d-none name"><code>apply_alpha.Rd</code></div>
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    <div class="ref-description section level2">
    <p>Applies alpha (or opacity) to a color in hexadecimal form by
converting opacity in the <code>[0, 1]</code> range to hex in the <code>[0, 255]</code> range
and appending to the hex color.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="fu">apply_alpha</span><span class="op">(</span><span class="va">color_hex</span>, opacity <span class="op">=</span> <span class="fl">0.5</span><span class="op">)</span></code></pre></div>
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    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
    <dl><dt>color_hex</dt>
<dd><p>A character string representing a hex color</p></dd>
<dt>opacity</dt>
<dd><p>Desired opacity of the output color</p></dd>
</dl></div>
    <div class="section level2">
    <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
    <p>A character string with added opacity level as hexadecimal characters.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span class="va">blue</span> <span class="op">&lt;-</span> <span class="st">"#0e6ba8"</span></span>
<span class="r-in"><span class="va">blue_transparent</span> <span class="op">&lt;-</span> <span class="fu">apply_alpha</span><span class="op">(</span><span class="va">blue</span><span class="op">)</span></span>
<span class="r-in"></span>
<span class="r-in"><span class="kw">if</span> <span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/ns-load.html" class="external-link">requireNamespace</a></span><span class="op">(</span><span class="st">"scales"</span>, quietly <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span><span class="op">)</span> <span class="op">{</span></span>
<span class="r-in">  <span class="fu">scales</span><span class="fu">::</span><span class="fu"><a href="https://scales.r-lib.org/reference/show_col.html" class="external-link">show_col</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="va">blue</span>, <span class="va">blue_transparent</span><span class="op">)</span><span class="op">)</span></span>
<span class="r-in"><span class="op">}</span></span>
<span class="r-plt img"><img src="apply_alpha-1.png" alt="" width="700" height="433"></span>
</code></pre></div>
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