May I have some suggestion on the choice of color for the above. Is it normal to have the same color with the walls (may have 2 colors of walls in a room) or just follow the same color of the ceiling. I am going to shift into a small 4 rm HDB where the living rm is L shape with L-Box all round. How to choose the scheme to make the cornice (brms) and L-Box in the living rm stand out?

Normally same colour as the ceiling.

When the lights are on, the light effect will naturally stand out, dun need to highlight L-Box.