The more secure we feel against our liability to any error to which, in fact, we are liable, the greater must be our danger of falling into it.
The whole basis of working in black and white and grays became the basis of my understanding of color, because it's all about tone, it's all about light and dark. If you don't get that, then your color work is going to be a mess. So that's the beginning of the toolkit: drawing and black and white media.