colors of charts in profil section should be the same like the list on the left eg. blue line and the letters of bullet are blue. People has problems to read the charts and statistics
When you hover over the graph it displays the name of the variant that points on the graph represent, with a small legend for that section.
Also, if you wish to check a specific graph for a specific variant or time control, you can do that by clicking the variant or time control on the left inside of your profile.