If you really love that pink bedding, you could easily do a wall color that "minimizes" the pink and makes it an accent color.
What about pale spring green walls? Or baby yellow? You could do sand colored, if you want neutral instead. Or you could do three walls in a neutral color and the fourth in a light pink that matches...so your room is not BURSTING with pink...but has subtle touches instead. I love playing with paint to figure out how to make the colors fade or pop
I think that sometimes what you think you are going to want changes when you see what you can actually do! Liam's room looks NOTHING like our original plans. We were going to do a border with patchwork puppies on it and the colors were black, tan, red, and cream. I hated the border when it came in and we decided on a bedding set that was blue, tan, chocolate, and cream. So his room ended up blue instead of red...with not a stitch of black to be found. Lol. Just play around with ideas and one will come to you!