Winter skies are very colourful, with a 'slash' of every colour really, sunrise and sunset (and in-between).
Maybe this is the best poem describing both sunrises and sunsets, their contrast and colours.
A slash of Blue - Emily Dickinson
A slash of Blue -
A sweep of Gray -
Some scarlet patches on the way,
Compose an Evening Sky -
A little purple - slipped between -
Some Ruby Trousers hurried on -
A Wave of Gold -
A Bank of Day -
This just makes out the Morning Sky.