Color Change for Clothing Photos

I have a set of PNG product shots— 18 images—that need a clean, consistent colour swap in two colours each. Each file shows a single garment on a plain background; nothing fancy, just studio-lit apparel... (Budget: €8 - €30 EUR, Jobs: Adobe Photoshop, Affinity Photo, Color Grading, Graphic Design, Image Processing, Photo Editing, Photography, Photoshop, Photoshop Design, Visual Design)