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There are several methods and some make work better on different object within your photo.
Here's a good starting point using Photoshop's replace color options - Photoshop: how to change color of an object - YouTube
I like to use select color range, then put that color on a separate layer and clean it up, then use hue/saturation to change the color.
1. Select Color range
2. Command+J , new layer from selection
3. turn off lower layer so you can see your selection
4. do any necessary cleanup
5. turn lower layer back on