The room pictured above was designed by Katie Leede. Even though the colors of red, white and blue are used, there is no particular theme attached to the room. The same goes for the room below designed by Katie Ridder.
The rooms below definitely have a more Americana feel because of the use of the American flag and stars as room decor accents.
also by Ashley Whittaker Design, almost the same layout!
room designed by Susan Kasler and featured in her book Inspired Interiors
(love the painted ceiling)
(a fabulous drum light fixture)
I forgot where the image below came from but I love the blue sliding door and camp-style beds. This would be such a fun nook for a sleepover!
If you don't have the resources to create the rooms above, here are some pre-designed bedding sets which will help you get started with that Red, White & Blue look:
The Nate bedding set is now on sale!
Lucky Horseshoes bedding set
And now a few options for a more modern take on the Red, White & Blue theme. Since these sets do not have any red in them, I would add hints of red with accessories. Or even better, paint red stars or the American flag on one entire wall!
On another note, since you all know I LOVE orange, the four sets above would look stellar with orange or even fuchsia if you really want to go with something out of the box.