On a recent watercolour weekend course, Judy and Carolyn focused on values. It doesn’t matter what colour you paint a subject so much as it matters that you get the values right. Using red filters, we can see any image as a monochrome value study. Here’s the reverse: a colour painting turned black and white to check the values.
We also talked about colour, particularly using complimentary colours. A lot of people wondered about the vermillion, but it works next to the blues!