|Each MacAdam Ellipse has a set of colors you can barely tell are different. A "uniform" color space would have disks of the same size for these. Source wiikipedia.|
Andrew rightly points out that for a color space to be kick-ass (my term) it should be at least somewhat uniform. So a challenge to all of you out there: create a uniform space that is RGB-centric. Or if you know of one, tell me!