Pick a bold color, a complementary color then 2 coordinating neutrals. You can invest in one color wheel for learning about complementary colors. Keep a rule in mind that opposite attracts because colors opposite to one another over a color wheel will make one excellent companion. For neutrals you can choose different shades of cream, natural wood, white and gray, which will look perfect with both contemporary and bold choices.
Now start with furniture. Make base of room neutrals, such as white, charcoal and black to make big accent of this room stand out. Do not compete with your natural wood. Let reclaimed floorboards and gorgeous built-ins shine by painted walls with light neutral like off-white. You can add color in one modern way by painting one wall with a painting. Choose a few colors having close relation for neutrals, but remember to vary textures. Make use of glass tables, reflective brown flooring, mirrors and chrome lamps and mirrors for complementing furniture.