Cadmium Orange Light.
Possibly after the earth pigments, my favourite pigment of all time because of it's abilty to meld so perfectly with that part of the colour wheel, combined with violets or reds or yellows it can add so much and it's tints are really superb.
The light refers to it leaning more towards yellow than red, in masstone it is like fire bound in oil, a fantastically powerful light orange hue, with potential to give heat and light to any mix of colours.
Being a Cadmium pigment it is opaque and a strong tinter, just a speck of this will go a long way particularly given the pigment load. Francois's paints are superb but this is particularly good in my opinion.
Pigment - PY35
Vehicle - Linseed Oil
Opacity - Opaque
Tint Power - High