<p>How about a dynamically and randomly generated plot (probably a scatter), generated on pageload and using the Google Charts API? Something like this logo submission to a previous contest: <a href="http://arbitrarian.wordpress.com/2008/02/23/dynamic-logo/" rel="nofollow noreferrer">http://arbitrarian.wordpress.com/2008/02/23/dynamic-logo/</a></p>

<p>The original idea changed based on the time of day, and the color of one of the lines changed as a function of the time.</p>

<p><img src="https://i.stack.imgur.com/43xFj.png" alt="alt text"></p>

<p>This solution obviates the need to decide on a single static logo and color scheme, and a randomly-generated scatter plot seems to be consistent with this site's focus on data.</p>

<p><img src="https://i.stack.imgur.com/TMR9Y.png" alt="alt text"></p>
