How can I change this black icon to the same shades and colors as this orange / gold icon?
I think most of the answers are overly complicated.
It’s been a while since I’ve used photoshop, but you’ll want to pick one of two color adjustment tools. Either ‘Colorize’ or ‘Hue/Saturation’.
Then simply adjust the color and saturation and brightness until you get a match.
No need to redraw anything or use layer masks.