Colors are distance to the pareto frontier for the given setting for "dealscope"! Easily noticed when axis and color are set to the same dimension (EG CPU) - but setting to different things allows you to visualize two dimensions (three, with price) without needing a 3D chart. I found it really useful to find outliers, but I realize it's a bit nonstandard!
Oh - and colors are grey-blue to red, with red being pareto optimal
Oh - and colors are grey-blue to red, with red being pareto optimal