This softer version of the green-orange combo is perfect for a young person's bedroom. Green walls create a relaxing sleeping environment, especially when paired with a great view of nature, and a shot of orange makes it easy to wake up in the morning.
When having a small room and you have a big window add colors from the outside into your room to make them look bigger. If you also add colors from the outside you can make the room look brighter. I like how the bed isn't big and how it also has the brown and green in it. The wall doesn't have any design and I think that also helps it seem that it has more room.