COLOR PRIMER: ULTRAMARINE BLUE

"Pressurized spray and aerosol containers cannot be shipped, and may only be picked up at the store."

The name says it all... But apart from Space Marines, this is also the perfect colour for Lizardmen, Imp. guard, Cygnar or American Civil War for instance.
The Ultramarine Blue colour works well with DARK Tone, shading it to a beautiful finish.