What should I do! I'm desperate!... Ok my family is building a bigger house and i get a...

Ok my family is building a bigger house and i get a bigger room that I am crazy just about!! But i have a slight problem... I have no conception what my color is going to be!
Here are a few things that might help you:
I want it to be a color that can be matched like pink and lime green or ashen and blue
I don't want pink because i have that now.
I'm 11 and pretty sophisticated
I approaching polka dots
I want it to have more than one color that matches the color of the wall.
I can with the sole purpose have one paint color
I want to have a cute color not white or camel or something like that
I am a very positive individual but not over positive
I want to color to be bright

Thanks so much i appreciate all your answers and can't wait to pick best answer.
Need back on designing a strange room?
Answers:    look for a color on this site and you can if truth be told upload your rooms picture(they have sample photos) and truly see the how the paint would look.

heres the link:http://www.behr.com/behrx/workbook/index...
How to sound-proof colossal spaces?
Yellow or teal...
I really like teal and brown and teal and pink...pink and brown...lots to choose from next to polka dots!
But there are some really cute yellow and pink polka dot stuff too...

If you choose teal as the wall color, you could do up with teal and pink in the summer and teal and brown within the winter and fall months...its interchangeable!!

Good luck, i love decorating!