Vermilion is no longer a colour in Artists’ Oil Colour, because it can be “mixed” by the artist. To create a paint closest in colour to Vermilion, we recommend a mix of Cadmium Red, Cadmium Red Deep and Titanium White.
Cadmium Red is the nearest match to Vermilion, so add very small amounts of Cadmium Red Deep and even smaller amounts of Titanium White. As with most things, colour mixing is a matter of experimentation – and only you can find the mix that pleases you the most. Vermilion is an opaque colour with an orange undertone. The Titanium White will ensure opacity and the Cadmium Red will give you the necessary vibrancy.