These are the colour scheme you can go with ,Highlight the staircase with dark colour with muted mild colour background.Muted colours will bring down the boldness of the projections and merge down its presence.

Currently my living room color is Matt orange & ceiling wall is light beige. 1st Bedroom is dark and light yellow and 2nd bedroom is dark and light Green. All are Matt color & not glossy & all walls are TEXTURE walls excepting the ceiling (off course 1 wall is dark rest all are light). I need your help to know how do I plan it now which can compliment the existing color but i want a much lighter shade this time. My eyes on answer thanks :)

Hello. The space and the furniture looks great and that’s one of the positives of your house. 1. Coming to the a living room, the sofa color is already bold, so u may use a neutral tone of Grey on the wall behind sofa and the adjacent wall that has a curtain (Place a plant between these two, hang a lamp from ceiling, also use a painting as shown in thr picture behind the sofa). 2. And the wall behind the dining table (with a single chair), paint rose gold. Note : Make sure the any artefacts are complimenting the furniture and wall Color. U may refer the platte.