umm, sorry, didn't guite understand term. colour does matter, think about working with say, pink, tools....Black in the other hand mainly symbolizes organization/professionalism, at least i think so.
My colour scheme on lab is mainly black/silver, and those esd-work surfaces add bit ''army'' look. i hated the army, but still, army stuff is made to last.
But, there is no right/wrong lab/workspace, all that matters is that you can do whatever job you need to do there.