This is referred to as “subtractive” color mixing because each pigment is taking something away from white light. Credit: Lewin Day The core issue lies in how digital art apps handle color.

As it turns out, there’s a good reason the big art apps haven’t tackled this ... a digital model for pigment-based color mixing. Once again, creative application of mathematics has netted ...

The value of colour is shown by creating a tint (mixing with white), shade (mixing with black) and tone (mixing with grey) of a pure red. Three examples of artists’ work show effective use of ...