There are a few different ways that you can isolate and replace colors in Photoshop. One way is to use the Select Color Range tool.
With this tool, you can select a specific color or range of colors to isolate. Once you have the colors isolated, you can then use the paint bucket tool to replace the color with another.
Another way to isolate and replace colors is to use the Replace Color tool. With this tool, you can again select a specific color or range of colors to isolate. However, instead of using the paint bucket tool, you can use the Replace Color tool to directly replace the color with another.
Finally, you can also use layer masks to isolate and replace colors. To do this, you would create a new layer and then use a brush to paint over the area that you want to change. Once you have painted over the area, you can then change the layer’s blending mode to “color” and choose a new color for the area.
No matter which method you choose, isolating and replacing colors in Photoshop is a relatively simple process. With a little practice, you’ll be able to quickly and easily change any color in your image.