I couldn't resist putting together some baby room inspiration based around the nostalgic, warm tones of autumn, which reminds me of walks in the woods crunching leaves as we go. Keep the walls white to make it modern - maybe get some paneling to install over the walls, and paint it white, as well as having a feature wall with the gorgeous wallpaper (3.) While this board is full of forest inspired decor, it's also pretty spot on right now with hints of mustard and earth tones.
Sources: (1.) Flock Birds Lampshade, (2.) My Woodland Alphabet Prints, (3.) Wallpaper, (4.) Hedgehog, (5.) Mushroom, (6.) Fox, (7.) Muslins, (8.) Basket, (9.) Quilt, (10.) Stool, (11.) Crib/Cot, (12.) Bear Rug, (13.) Chest of Drawers
Top Image: Leaf Garland