Answer:
False.
Step-by-step explanation:
Henri Matisse was a french painter well-known by his use of colour in his paintings. Actually, he was identified with fovism, which is a pictorial french movement characterised by its provocative use of colour.
Therefore, if Matisse belonged to fovism, then he never abandoned the use of optical colours. It's important to know that optical colours mixing is a phenomenon where a viewer perceives colour as a result of superposition of many colours.