While most light shades make for a good pooja room colour as per vastu, there are a couple of options that rank higher than the others.

1. Warm White: As you'd expect, warm white is the classic safe pooja room colour that ranks high when it comes to the best colour for a pooja room. Not only is it a good standalone colour but it also makes for a good backdrop for the idols and murtis you might bring into the pooja room.
2. Light yellow: While we've covered the option of yellow colour for the pooja room, it is worth mentioning that being closest to white, this shade adds a pop of colour without straying too far away from the traditional white colour scheme.