Okay but here's the thing about Skyrim's colour.
In the imagespaces / post-process filters and shit, there's an option for tint. And for daytime they just made it a shitty brownish-grey and set the opacity of the tint to ~60%. They changed the tints to red and oranges for sunsets and sunrises, but once the post process shit is removed, you see a lot of colour.
Granted, because of the fucked up kind of mix in contrast, brightness, and white balancing, it's still all ugly as hell, but there's colour at least.