To create a romantic atmosphere in a room, the instant thought is to use warm and rich colours for your palette. Naturally shades of red come to mind, but be wary that red can be one of the most difficult colours of paint to get right. In fact you should expect to need at least two coats of red paint to get a consistent coverage. But, no you do not have to incorporate red, although it is a wonderful addition. To be more subtle with your intentions the lighter green tones, such as sage or celery are great options. They are cool, soothing, yet vibrant enough to put a fire under your get up and go, if you know what I mean. While green tends to be the lesser applied romantic colour, it is very effective, and much loved by those who encounter it.