Thanks for all the great suggestions. :) I should have mentioned this room will be shared between my almost 5 yr old and my 3 yr old. My 5 yr old has expressed her love for "purple". Her big sisters bedroom is lavender and she has said before how she wishes her bedroom was "purple".. even though she asked for pink when we first moved in just a year ago!! Which she got! But I have to switch the bedrooms around anyway because we have a new addition to the family.. another girl! So 5 girls, 1 boy, and he has the bigger bedroom, it would have worked out if we had another boy but I took my chances and now I need to switch things up! Also.. something to consider.. the room I am working with has oak trim, doors, and window frames. I'd rather not paint it because to do it right is a bit more work then I can take on right now. I know because I painted my oldest daughters trim and her room is much smaller. It's a big job! It is what it is. Hopefully it will still look pretty and my girls will love it. If it helps I can share a picture of the room. As I already mentioned, it's my 6 yr old boys bedroom right now. The walls are painted a cream color (Behr Raffia Cream) with one dark brown wall (Behr Butternut Wood).

You can get a headboard the same color as the dresser, and match the night stands with it. And based on the photo below, you can use the grays tones instead of the green. dark gray sheets and lighter gray on the walls, with some decoration in wood style. And do the decorations on the blue that she wants, with pillow, a rug, curtains...

As to furniture placement, create zones -- one part for sleeping and dressing and the other part for your school work and leisure activities. Red for a wall can be a difficult idea to sell to homeowners. So is purple. You might promise to repaint the red accent wall white or another color just before the house is put up for sale. Red might also be a selling point if you're working toward a theme that makes red important enough for it to be a wall rather than just red accessories -- for instance a red/white/blue patriotic theme. Luckily for you there are a lot of different shades of blue -- very light to very dark. You could choose blue denim -- new dark blue or lighter old faded - or a bold cobalt blue. Before deciding, consider an overall theme for your room. Would you want flower garden or beach or mountains or patriotic or something else. That can help you choose the shade of blue. Also, you can still add red on your wall another way. Fabric: You could hang a red rug or red bedding such as a quilt or comforter from eye hooks attached to the very top of the wall next to the ceiling where there will be a top wall plate of wood boards to hold the weight. Wood: Is anyone in your household DIY inclined? Does anyone in your home shop thrift stores where you might find shelving (such as Habitat for Humanity Restore Stores) at a budget price? Any shelving you can paint your favorite red and hang on the wall has the potential to make the wall predominantly red. https://www.pinterest.com/pin/377528381246213109/ https://www.pinterest.com/pin/338262622014252931/ https://www.1stdibs.com/furniture/storage-case-pieces/bookcases/set-of-three-wall-mounted-bookcases-hvidt-mlgaard/id-f_13146401/ If you pull your bed away from the wall, you might even consider floor to ceiling shelving -- red, of course -- against the wall behind it.

You said she wants a bigger desk, you need more information from her about what she wants to do on the desk and store there. Does she need space for filing? Will she be drawing or drafting? Does she need space to put a laptop or does she have a regular computer monitor and screen? Two screens? Does she have a printer too? Other computer paraphernalia? How many feet of bookshelves does she need? Approximately how many feet of drawer space does she need for inside the desk? Will it be for general office supplies, or does she have art supplies too? Approximately how many feet of drawer space does she need for clothing? Does she study and do homework in her bedroom or somewhere else in the house? Does she have friends sleep over so that you really need place for two to sleep in that room? How old is she, what grade is she in, and when she starts college, do you think she will stay living with you, or do you think she will go away? Of course one never can predict the future, but I ask to get an idea how much $$ you might want to sink into this. Firstly I want to tell you that it is marvelous that you are thinking about re-decorating to suit your teenage daughter's preferences and needs. Back to the subject at hand. Bed They often have sleepovers. I have found (and I had one myself) that trundle beds work very well for this (unless you are fortunate enough to have a guest room. I prefer the type of trundle bed where the extra bed is underneath and rolls out on wheels and pops up so the two beds are on the same level. I especially like it when instead of sticking out from the wall, the long axis of the bed is against the wall. You can get the bed with a wooden or metal daybed type upper portion against which to put large comfy thick dense pillows, and it becomes a "sofa" for your daughter and her friend. Even without that frame, you can purchase or have made two large pillows each 1/2 the length of the bed of thick dense foam covered in batting, then muslin, and then a zippered cover of whatever fabric you choose. Get two sets, and make them machine washable! Desk For serious work, especially with a computer, often an L shaped configuration works well, and this is best done in the corner of a room. Even if your daughter works with a laptop almost all the time, she will appreciate a hookup to a second screen at home as that will facilitate report writing. She can have source material on the second screen while she does the writing on her word program on the first screen. It's also just nice to compare two different things at the same time on nice size screens, instead of a split screen image which is small. And sometimes the second screen is best at an angle. from the first screen. Normal desk height is 30 inches. If the windows come down a bit low, you might be able to remove the lower parts of the window (the stool and apron) without affecting the function of the window to allow placement of a desk length. If she is an artist she may need an easel. Or depending on the type of art, she may prefer a drafting table. She may want the type of storage table with many shallow drawers for art supplies. She may want something like that for all her cosmetics and jewelry! There are inexpensive versions of those as well, and you can get one or two of those to tuck under one of the arms of the L. Storage To use space most efficiently, think vertically! In the space between the windows you can put up shelves, or even mount a properly sized bookshelf, so no space is wasted by the triangular brackets. Above the desk there are so many different ways to store things, systems you can make or buy. Look at the IKEA kitchen wall storage units that have attractive bins and baskets that hang from rods. Only instead of using them for kitchen utensils, your daughter can use them for pens and pencils, rulers, staplers, tapes, paint brushes, etc. You can make something yourself out of peg board. There are a myriad of ideas on the internet. Look up do it yourself (DIY) home office ideas, and DIY home office storage. Decor Of course consider your daughter's preferences. I would try to encourage neutrals (such as shades of white) for the large things and use her favored colors for the smaller things, as her tastes may change. A 12 year old may love pink, and by the time she is 14 she may despise it and want orange and by the time she is 15 she may want black! The other advantage of white is that it is washable and often bleachable. The other advantage of light walls is that she can put up any type of poster or wall decor. There are non-stick wall decals that are lots of fun, too, not in the least childish either, and some marvelous easy to put up and take down wallpaper that won't ruin your walls. Good luck!