Pale Blue, Slate, Night

Pale Blue, Cobalt, Night

The sky in full and in darkness

Pale Sky, Cobalt, Navy

Blue from pale to deep

Cloud, Steel, Night

Sky darkening to storm

Pale Blue, Violet, Night

Sky into twilight into dark

Pale Blue, Violet, Dark

Cool spectrum from open to deep

Violet Dusk

The sky fifteen minutes after sunset