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😎 Give your xaringan slides some style
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xaringanthemer/dev/reference/apply_alpha.html

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  3. converting opacity in the [0, 1] range to hex in the [0, 255] range

  4. and appending to the hex color."><title>Add alpha to hex color — apply_alpha • xaringanthemer</title><!-- favicons --><link rel="icon" type="image/png" sizes="16x16" href="../favicon-16x16.png"><link rel="icon" type="image/png" sizes="32x32" href="../favicon-32x32.png"><link rel="apple-touch-icon" type="image/png" sizes="180x180" href="../apple-touch-icon.png"><link rel="apple-touch-icon" type="image/png" sizes="120x120" href="../apple-touch-icon-120x120.png"><link rel="apple-touch-icon" type="image/png" sizes="76x76" href="../apple-touch-icon-76x76.png"><link rel="apple-touch-icon" type="image/png" sizes="60x60" href="../apple-touch-icon-60x60.png"><script src="../deps/jquery-3.6.0/jquery-3.6.0.min.js"></script><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><link href="../deps/bootstrap-5.1.3/bootstrap.min.css" rel="stylesheet"><script src="../deps/bootstrap-5.1.3/bootstrap.bundle.min.js"></script><link href="../deps/IBM_Plex_Mono-0.4.2/font.css" rel="stylesheet"><link href="../deps/Outfit-0.4.2/font.css" rel="stylesheet"><!-- Font Awesome icons --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/all.min.css" integrity="sha256-mmgLkCYLUQbXn0B1SRqzHar6dCnv9oZFPEC1g1cwlkk=" crossorigin="anonymous"><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/v4-shims.min.css" integrity="sha256-wZjR52fzng1pJHwx4aV2AO3yyTOXrcDW7jBpJtTwVxw=" crossorigin="anonymous"><!-- bootstrap-toc --><script src="https://cdn.rawgit.com/afeld/bootstrap-toc/v1.0.1/dist/bootstrap-toc.min.js"></script><!-- headroom.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/headroom.min.js" integrity="sha256-AsUX4SJE1+yuDu5+mAVzJbuYNPHj/WroHuZ8Ir/CkE0=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/jQuery.headroom.min.js" integrity="sha256-ZX/yNShbjqsohH1k95liqY9Gd8uOiE1S4vZc+9KQ1K4=" crossorigin="anonymous"></script><!-- clipboard.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.6/clipboard.min.js" integrity="sha256-inc5kl9MA1hkeYUt+EC3BhlIgyp/2jDIyBLS6k3UxPI=" crossorigin="anonymous"></script><!-- search --><script src="https://cdnjs.cloudflare.com/ajax/libs/fuse.js/6.4.6/fuse.js" integrity="sha512-zv6Ywkjyktsohkbp9bb45V6tEMoWhzFzXis+LrMehmJZZSys19Yxf1dopHx7WzIKxr5tK2dVcYmaCk2uqdjF4A==" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/autocomplete.js/0.38.0/autocomplete.jquery.min.js" integrity="sha512-GU9ayf+66Xx2TmpxqJpliWbT5PiGYxpaG8rfnBEk1LL8l1KGkRShhngwdXK1UgqhAzWpZHSiYPc09/NwDQIGyg==" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mark.js/8.11.1/mark.min.js" integrity="sha512-5CYOlHXGh6QpOFA/TeTylKLWfB3ftPsde7AnmhuitiTX4K5SqCLBeKro6sPS8ilsz1Q4NRx3v8Ko2IBiszzdww==" crossorigin="anonymous"></script><!-- pkgdown --><script src="../pkgdown.js"></script><link href="../extra.css" rel="stylesheet"><meta property="og:title" content="Add alpha to hex color — apply_alpha"><meta property="og:description" content="Applies alpha (or opacity) to a color in hexadecimal form by

  5. converting opacity in the [0, 1] range to hex in the [0, 255] range

  6. and appending to the hex color."><meta property="og:image" content="https://pkg.garrickadenbuie.com/xaringanthemer/logo.png"><meta name="twitter:card" content="summary"><meta name="twitter:creator" content="@grrrck"><meta name="twitter:site" content="@grrrck"><meta name="robots" content="noindex"><!-- mathjax --><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script><!--[if lt IE 9]>

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  81. <div class="row">

  82.   <main id="main" class="col-md-9"><div class="page-header">

  83.       <img src="../logo.png" class="logo" alt=""><h1>Add alpha to hex color</h1>

  84.       <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>

  85.       <div class="d-none name"><code>apply_alpha.Rd</code></div>

  86.     </div>

  87. 

  88.     <div class="ref-description section level2">

  89.     <p>Applies alpha (or opacity) to a color in hexadecimal form by

  90. converting opacity in the <code>[0, 1]</code> range to hex in the <code>[0, 255]</code> range

  91. and appending to the hex color.</p>

  92.     </div>

  93. 

  94.     <div class="section level2">

  95.     <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>

  96.     <div class="sourceCode"><pre class="sourceCode r"><code><span><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></span></code></pre></div>

  97.     </div>

  98. 

  99.     <div class="section level2">

  100.     <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>

  101.     <dl><dt>color_hex</dt>

  102. <dd><p>A character string representing a hex color</p></dd>

  103. 

  104. 

  105. <dt>opacity</dt>

  106. <dd><p>Desired opacity of the output color</p></dd>

  107. 

  108. </dl></div>

  109.     <div class="section level2">

  110.     <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>

  111.     

  112. 

  113. <p>A character string with added opacity level as hexadecimal characters.</p>

  114.     </div>

  115. 

  116.     <div class="section level2">

  117.     <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>

  118.     <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="va">blue</span> <span class="op">&lt;-</span> <span class="st">"#0e6ba8"</span></span></span>

  119. <span class="r-in"><span><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>

  120. <span class="r-in"><span></span></span>

  121. <span class="r-in"><span><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>

  122. <span class="r-in"><span>  <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>

  123. <span class="r-in"><span><span class="op">}</span></span></span>

  124. <span class="r-plt img"><img src="apply_alpha-1.png" alt="" width="700" height="433"></span>

  125. </code></pre></div>

  126.     </div>

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  132.   <p></p><p>Developed by <a href="https://www.garrickadenbuie.com" class="external-link">Garrick Aden-Buie</a>.</p>

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