Here is a small tutorial to show you how I colour in Tilda's face with promarkers.
I first take my image.
I then colour in the whole face in ivory colouring in a swirling motion.
I then add blush to the area's I want highlighting slightly darker.
Then blend this in by going over the whole image in ivory again.
I then add dusty pink to the cheeks and then blend this in.
The finished result.
I hope you find this useful x