If you have a room that is either painted in a dark color or just dose not get a lot of sunlight, the best way to lighten the room is with either a set of cream or white shears, or to stick with a bright colored fabric like yellow, or a sky blue.
There are a few colors I would recommend for your curtains, some of the colors I would suggest you use for your curtains is: red, baby blue, mahogany, brown, or yellow. These colors would depend on if you want your curtains to stand out or blend in with the scenery.
Purple
Lavender curtains would go best.
When you are painting, you would add white or another light color.
I would suggest a light color wall such as kahki or off white. Then for the curtains maybe a white or even a sage green. You definetly want a light color on the walls so as to lighten the room so it doesn't have a cave affect.
Tab top curtains will probably go better with the decor of a little boys room.
This would simply lighten the brown and create a yellow brown.
The best curtains would be light purple and dark purple stipey
It is not safe and not recommended to put honey in your eyes to lighten the color.
Light Blue
There are many neutral colors that would go well with purple curtains. However, it all depends on your sense of style and coordination. It is really a personal preference.
Off white or brown would be a good color to go with orange and tan paint. Anything nuetral or earth toned.