The most boring room in the world

This is our bedroom:

Yes, that is my version of a made bed. Sue me.

It is quite possibly the most boring room in the world. It's where beige came to die, and I've gotten to the point where I need a change, not to mention some COLOR.

Here's the problem: I'm bad at decorating. Actually, I'm terrible. Horrible, even. I have NO eye for this kind of thing - what goes together, what clashes, where to take risks and when to say "OMFG are you blind?"

I wanted to repaint, but Ben likes the current color scheme of camel, white and chocolate brown so I'm working around that; blues and greens work the best with this particular tone of paint, so those are the colors I'm considering. Oh, and the ceiling light is similar to this one - not identical, but silver and in the same general style. We don't have the cash to replace furniture, so the only options are wall art, new bedding and some table lamps...and the more budget friendly the better.

Since I'm a big ole nerd, I'm entertaining myself by making mock-ups of a finished room in Photoshop - this is my front runner so far:

Bedding from Overstock. 

Green glass lamps are Ljusås Salbo with the Erserud lampshade from Ikea (I liked these but at over $300 a pop, that ain't happening).

Trees are wall decals from Etsy (I know decals aren't everyone's style but I like them).

Thoughts? Do the lamps and duvet cover add enough color to the room, or is it still blah? Is the foliage print on the duvet too matchy with the trees? Does it look like a 5 year old sleeps there? Do I need to give up on decorating and just go live in a cave? Give it to me straight!