Manual Beard Color Retouch Needed

I have two JPEG portraits where the beard has turned noticeably white. I need that white facial hair meticulously recolored to a deep, natural-looking black while preserving every strand’s texture and keeping skin tones untouched... (Budget: ₹600 - ₹1500 INR, Jobs: Adobe Photoshop, Illustrator, Photo Editing, Photoshop, Photoshop Design, Visual Effects)