span> <span class="op">&lt;-</span> <span class="fu">shades_of</span><span class="op">(</span><span class="fl">50</span>, col_1 <span class="op">=</span> <span class="st">'grey1'</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="seecol.html">seecol</a></span><span class="op">(</span><span class="va">grey50</span>, main <span class="op">=</span> <span class="st">"50 shades of grey1"</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="