Van Gogh’s Starry Night Over the Rhône (1888). Blue used to create a mood or atmosphere. A cobalt blue sky, and cobalt or ultramarine water.

Amazing Color Blue Pictures to Inspire You

And its uses in the world… of architecture, art and fashion.

I have been thinking…Why do People Think Blue World is a Good Idea?

Your Blue World May Never Works Out the Way You Plan.

This blue world here is not the same as your blue world.