Subject: What colour would the sky be if earth's atmosphere were thicker?

I understand that the sky is blue due to rayleigh scattering, but I read that
the sky looks red at sunset because the light passes through more air. Does that
mean, then, that an atmosphere ten times thicker would give a red sky? Or would
it get paler and paler blue (since if you are high up and in thin atmosphere you
go from black sky to dark blue sky to light blue sky)? If not any of these
colours, then what would happen?

Re: What colour would the sky be if earth's atmosphere were thicker?