I definitely would avoid colours as colours are adjectives so it will end up sounding like a description. Nature names (other than Aurora) could be fine though, I'd have thought?
Fern Skies
Clover Skies
Wren Skies
Robyn Skies
Lily Skies
Poppy Skies
Daisy Skies
These are random examples but all sound fine to me, unless I'm missing something (which is always v possible with me)!