Help with living room palette

[Justkoko]

Can anyone help with a colour scheme please?
Sofa is pretty much the colour in the picture. Like an airforce blue but velvety so shines lighter or darker and if photographed looks bright blue (!?) Furniture is dark mango type wood along with brass and glass light fittings.
Walls are currently tranquil dawn (dulux) but it just doesn't fit somehow. It's bland. And for the life of me I cannot find curtains I like.
Would it work better to go different with the walls?

I'm no expert. However, I've got walls and a sofa of a similar colour. Have brought it together with burnt orange / terracotta cushions / lampshade / rug (also with yellow ochre) of different textures and am very pleased with it.

I've got similar. Cream curtains and carpets, lots of plants and some Seagrass colours go with mine

I think you need warmth on the walls. Blue sofa, cool neutral blue-grey walls — it’s too cool.