Yes, this is it! I'm quite happy without the blue

.
One last suggestion: maybe the mist could use some more detail. If you'd decrease the smallest scale of the density fractal and maybe increase the roughness in the density tab a bit it might add some more sense of scale.
Btw: have you tried to check "receive shadows from surfaces"? I don't know if this would make any change, and it increases render times, but maybe you would get some nice rays?!