Thank you both! Pretty much working up from a base of darkened oxford blue and working up to lighter tones with pale blue grey, various light flesh tones (sunny skin tone and salmon rose etc) plus some purple/red inks for low lights. Will be darkening and lightening the skin until I feel happy with it
For the yellow, used the colours below: Again, lots of work still to do on on it but happy so far. Thanks for the encouragement!