What spectral colors are designated by Newton as simple?

Newton designated the following spectral colors as simple: red, orange, yellow, green, light blue, blue, violet.
Newton made an experiment on the decomposition of white light using a prism. White light is refracted in a triangular glass prism and a multi-colored strip appears, which Newton called “spectrum”. Newton concluded that there are simple colors that do not differ when passing through a prism, and complex ones, which are a combination of simple ones with different refractive indices.