The Stockman and Sharpe (2000) 2° cone fundamentals, as found <a rel="nofollow" class="external text" href="http://cvrl.ucl.ac.uk/cones.htm">here</a>, plotted against the most accurate sRGB spectrum I could manage. Now in SVG.
<a href="//commons.wikimedia.org/wiki/User:BenRG" title="User:BenRG">BenRG</a>
<span class="int-own-work" lang="en">Own work</span>