How to liven up a bedroom?

Accent with either shades of blue or grey & black. Add drapes like these:

https://www.wayfair.com/Andover-Mills%E2%84%A2--Liesel-Striped-Light-Filtering-Rod-Pocket-Single-Curtain-Panel-X112533832-L6260-K~W001422721.html?refid=GX434330219279-W001422721_2035238614&device=c&ptid=900781102753&network=g&targetid=pla-900781102753&channel=GooglePLA&ireid=48696990&fdid=1817&PiID%5B%5D=2035238614&gclid=CjwKCAiAo5qABhBdEiwAOtGmbvj8PqAt-ipeO6qbqMgaexMrhjYD4HVTYAKDxEsCx-z-zyThCbHeyxoCP7kQAvD_BwE

And bedding like this:

https://www.bedbathandbeyond.com/store/product/madison-park-essentials-serenity-comforter-set/3278912?skuId=46169419&enginename=google&mcid=PS_googlepla_nonbrand_bedding_online&product_id=46169419&adtype=pla&product_channel=online&adpos=&creative=224097645815&device=c&matchtype=&network=g&utm_campaignid=71700000037210665&utm_adgroupid=58700004139975888&targetid=92700034085511266&gclid=CjwKCAiAo5qABhBdEiwAOtGmbmYGQeYdzf-fIrK63g95Z_g26bhS1Yok_N9juNlXGa98yAc0Q5lLUhoCmnIQAvD_BwE&gclsrc=aw.ds

There a lots of ideas to inspire you on this Pinterest board:

https://www.pinterest.com/scarlet_hau/light-yellow-walls/

Do you have any fabrics with other colors and patterns going on in there? If not - go for it! Also, art work on the walls will add lots of personality. :)

Add fabrics with print that has pops of color.... I am redoing my client's bedroom right now, and I brought her a new set of curtains in a boho chic pattern to go with her comforter color and the new wall color. A few nice pillows, we did 2 Euro pillows, and one with a embroidered leaf. Pictures on the wall can add color if selected to be a darker shade of your theme color, or has a brighter picture matt. Lamps shades can also add interest, I got her a handmade paper one with flowers and leaves in it.

use pops of color in lamps, pillows, curtains etc that go with the wall color it will make a world of difference even add rugs

I would add some blues and whites in the room! I would add a rug in an accent color under the bed, then add some pillows in blues. You could also update the curtains in the room.

Add blue or green accessories like throw pillows. Maybe hang a tapestry.

Thank you

Wall mural.

https://www.amazon.com/wall-murals-bedroom/s?k=wall+murals+for+bedroom

An accent wall would add some pop.

Here are some examples: https://alifeunfolding.com/how-to-use-cedar-shake-as-an-cottage-style-accent-wall/

https://alifeunfolding.com/a-diy-mid-century-accent-wall/

Hi Susan, you could add some color with art and accessories. Or add a feature wall, it will really perk up the look

https://homeguides.sfgate.com/liven-up-bedroom-46529.html