You might be able to push the differences between slightly cooler and slightly warmer colors throughout the face

19

Use more different colors to create depth

12

having reflected light in the shadowy side of the face like on the upper cheekbone could help

10

i think you need more lines and textures? like you have the colors correct and in the right spaces but it’s too smooth

5

Changing your background color should help. Bright white tends to wash things out and it’s probably visually throwing your off since the reference has a dark color

5

i would use some darker colors to emphasize depth like with the lips and lines in the face. i usually use a darker shade of brown to indicate a crease then shade it out a bit

2

also adding some highlight the outmost points of the face like cheeks nose and forehead

1

are you just taking the colors from the picture directly???

1