The color looks off

• Too light or too dark: the photo's light dominates. Correct with "lighter" or "darker".
• Too saturated: muted colors can render a touch strong. Correct with "more muted" or "more gray".
• Sheen: the model paints matte by default. "Semi-gloss" in the correction adds shine.
• Screen: compare on the phone the customer will use; screens differ.

Rate the render and say what was off; that is what trains the model.