There is a basic premise that must be taken into account and that all derive from the primary colors: red, yellow and blue. Mixing two primary colors you get a secondary color. For example yellow and blue results in green, yellow and red gives orange, blue and red gives purple. And if you mix a primary color with a secondary tone you get a tertiary color, softer.
The reds, oranges, toasted, golden pinks and yellows are warm colors. They are known as "dominant" because it gives the impression that approach, and are ideal for giving warmth a cold room, facing south.
At the other end of the scale are the cool colors: blue, green, lilac, púrupuras, pink and turquoise. It is generally easier to live with them, because they create a feeling of space even when the rooms are small.