More colour mixing and starting to think about a painting

Thinking about a big sky and a vibrant sea. I have a photo of the sea at Killiney with a dark big sky and the sea shining with an unreal glow.

Trying a few colour mixes that woud match the mood. 

prussian blue, carmine, burnt umber

It didn't quite work out so well when I went to paint it, though! Will try again!