I was wrong. They were consummate artists who understood the workings of the human eye. They worked very hard on their prints, balancing every element to maximize the visual intensity. Then I wouldn't have to dodge or burn. If you dodge and burn color images, you will need to understand color space.
Color space is how color is represented in three dimensions.
Unfortunately you need to know about four of them. Used for monitor screens and in most image file formats. Used in inks for printing. HSV - Hue, Saturation, Value. Hue is what we perceive as color.