s="op">+</span> <span class="fu">ylab</span><span class="op">(</span><span class="st">"Estimated Autocorrelation"</span><span class="op">)</span> <span class="op">+</span> <span class="fu">scale_colour_manual</span><span class="op">(</span>values <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span><span class="op">(</span><span class="st">"#0033FF"</span>, <span class="st">"#C0C0C0"</span>, <span class="st">"#CC0000"</span><span class="op">)</span><span class="op">