Dalton48 has both shown us that I have it right and provided us a translation of the legend

Black - Agrarian Party

Magenta - Citizen's Power

Cyan - Democratic Party of Russia

Purple - Communist Party of the Russian Federation (KPRF)

Burgundy - Union of Right-Wing Forces

Green - Liberal-Democratic Party of Russia

Light Blue - Just Russia (as in justice)

Red - Patriots of Russia

Aquamarine (?) - United Russia

Putin Supporter Turnout v. Turnout by Supporters of Other Candidates

If I understand the above graph correctly -- and I stand to be corrected -- the blue dots show the percentage of Putin supporters that showed up for the last election. Each dot represents a single voting district. All other coloured dots show the percentage of supporters for other candidates that, supposedly, could not be bothered to bundle up to vote. Absolute numbers of supporters are not shown. I am not saying that the percentage of voters who arrived at the polls for each candidate ought to be perfectly equal, but certainly -- if everything during the last election was on the up and up -- the correlation ought to have been much, much closer.