Feature wall blue recommendation for kids bedroom

Hi
I need to choose a feature wall colour and wanting a really nice deep blue (Navy).

It’s for both my son’s bedrooms and all other walls are in Dulux Tranquil Retreat (grey).

They are 3 and 10yo so styling will obviously differ due to ages but want to just have the one colour.

Furniture is mostly white for both but I’m introducing some light timber pieces in to my 10yo’s space as my 3yo is inheriting most of his big brother’s stuff when we move in, which is mostly red highlights with white furniture


Photos would be great if anyone has painted recently with something they’re really happy with.

Thanks so much
Claire