Thanks for posting those caps, Red5!
That whole binary sunset scene have looked different on every video source I've seen, the colortiming even differ between shots in the various sources, from the close up of the suns to the close up of Luke, sometimes red/orange and sometimes blue/purple. It makes me mad!
The Gout isn't just darker, the sky is also tinted blue. In the Senator Theater cap it actually looks like he gazes at a twin sunset and not two moons or planets that the later video incarnations and especially the SE/'04 will make us believe. I don't know how reliable that photo really is but IMO. it should be that bright and it looks right to me. I really hope more references of that scene appear in the future.
It looks like they got it right in the Canyon scenes then, if you just take out the small red tint in the Gout it should look right.