BASIC CONCEPTS OF THE COLOR LAW:
There are 3 primary colors (Blue, Yellow, Red) which mixed together give life to the secondary colors (Green, Orange, Purple). There are some additional points to mention about the influence of one color or reflection on another color. The colors, reflections and their nuances have warm dominants (Yellow, Orange, Red) or dominant cold (Blue, Green, Purple). For every nuance or warm color there is a cold opposite. By overlapping them they merge without giving rise to any predominant tonality and both will be brighter. If instead two similar colors (Yellow and Red) are combined, they tend to fade.
The gray is obtained from the mixture of RED + BLUE + YELLOW.