My personal favourite colour is red. However, being a professional home stager and interior decorator, this is not a colour I get to use often.
For my staging clients, my favourite interior wall colour is Benjamin Moore Natural Linen cc90. This light tan colour works well with soft grays such as BM Revere Pewter HC172, BM Edgecomb Gray HC173 and even BM Gray Mist cc80. As a ceiling and trim colour, BM Dune White cc70 is a beautiful tone of white.
Keep a fairly neutral palette allows vendors and home owners to bring in variety of brighter colours with accent pieces, textured fabrics and upholstered goods.