color as text on every one of surfaces: unchanged when it already reads
at min against each, else stepped toward pole by the least amount that
does. The least, so a dim role stays as dim as the rule allows and keeps
its place below the brighter ones. A pole that cannot reach min gives
the pole itself, the most any colour could do on those surfaces.
coloras text on every one ofsurfaces: unchanged when it already reads atminagainst each, else stepped towardpoleby the least amount that does. The least, so a dim role stays as dim as the rule allows and keeps its place below the brighter ones. A pole that cannot reachmingives the pole itself, the most any colour could do on those surfaces.