RGB is not a colour, it is a formula to mix colour

If you can see it with your eye it is a colour. How you control colour is one of the elements that will determine how the viewers eyes moves across your image. From the moment of capture understanding the formula to mix colour will make your images more successful when they are printed.
If something moves you take a picture of it, dont hesitate or that moment will be lost. The moment of life happens it will not re happen. Viola Spolin said, in absolute spontaneity, you get absolute truth. You can only be one way when you are spontaneous and that is truthful. By staying in the moment & allowing the spontaneity of your  experience to cause the shutter to be fired.