Why It Works
For each of the 650 constituencies, four symbols are added to the map to represent winners, runners-up, third place, and others. Symbols are offset, sized proportionally by vote number, and randomly rotated to give the sense of paint splatters. Transparency mutes all but the winner’s symbols for an overall impression of a messy mix of paint. Against a dark grey canvas, colors pop and then blend just as they do in electoral geography.