[rjrodger]

Visible light was scattering off densely packed electrons up to about 300k years after the Big Bang - so I guess - white.

[ben_w]

White, redshifted so hard it's the blackest black we ever experience.

(I want to add a H2G2 joke here, but I can't figure the right way to reference making God disappear in a puff of logic related to the Babelfish…)