It's been posted before, but I'll post it again for people who may be still using the default color correction for AH2 when offline flying.
This, is my best try in trying to represent realistic color conditions in AH2.
In arena settings:
ColorCloud[Day] = 170, 170, 170 (00AAAAAA)
ColorCloud[Dusk] = 170, 170, 170 (00AAAAAA)
ColorCloud[Night] = 20, 20, 20 (00141414)
ColorDuskFog[Day] = 255, 149, 88 (3F5895FF)
ColorDuskFog[Dusk] = 255, 138, 36 (3F248AFF)
ColorDuskFog[Night] = 0, 0, 0 (00000000)
ColorFog[Day] = 179, 208, 238 (3FEED0B3)
ColorFog[Dusk] = 131, 142, 187 (3FBB8E83)
ColorFog[Night] = 21, 20, 16 (3F101415)
ColorLight[Day] = 255, 255, 255 (3FFFFFFF)
ColorLight[Dusk] = 249, 202, 142 (3F8ECAF9)
ColorLight[Night] = 181, 180, 173 (3FADB4B5)
ColorSky[Day] = 149, 195, 255 (3FFFC395)
ColorSky[Dusk] = 111, 123, 196 (3FC47B6F)
ColorSky[Night] = 0, 0, 0 (00000000)
ColorSun[Day] = 250, 255, 245 (3FF5FFFA)
ColorSun[Dusk] = 253, 240, 185 (00B9F0FD)
ColorSun[Night] = 255, 105, 0 (3F0069FF)
