I hate to be the Scrooge here, but I do see some problems, with an otherwise outstanding "Jimmie".
You have two areas of visual conflict. The strong blue light on the hair, which I like fights with the violet shirt. The eye goes back and forth between the two strong colors and the face becomes seondary. I tried some color aid paper but it is hard to do it on a monitor.
Leave it for a while, take a few breaths and try this. Scribble colors on a seperate piece of paper and hold it up to the pastel.
What I may think might work is if the shirt goes navy and there is a sharp orange ( a complementary color) accent somewhere near her head . Her lips? Her cheeks? Look at some Gaugins.
The line in her bottom lip is a bit too strong.
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