Aqua Blue

I want to paint the wall of my living room a two tone blue water?
Does anyone know where I can get some ideas of designs instead of 1 / 2 blue 1 / 2 dark blue. I really like a dark wall with a swirl design in the lighter blue. You can see that in my head, but would like to buy design and instructions not to make it look awful.I plan on painting the walls a color other white on the beige. My apartment is light brown well.
You can paint the entire wall one color and then use a template to add a design in another color. You can create your own template to get the right paper, maybe even a plastic cover, draw your design then cut with Xacto knife. If you have a program, even Microsoft Publisher, you can create on your computer then print on paper. Sounds fun, hope this helps.
My 2010 Camaro – Aqua Blue Metallic