What you'll need
2. In the Layers panel (Window > Layers), click the Create new fill or adjustment layer icon and choose Gradient Map to open the Properties panel.
5. To change colors, click the gradient preview, then double-click on a Color Stop to open the Color Picker and select your desired hue. Click OK. Adjust each Color Stop as needed.
Note: A gradient is made of two or more colors defined by color stops. A color stop is represented by a small square icon just below the gradient preview in the Gradient Editor.
6. Adjust the balance between colors by dragging a Color Stop or Color Midpoint to a new position on the spectrum.
7. Add additional Color Stops to the map by clicking directly underneath the gradient. Edit the new stops as needed.
To learn more, visit the Photoshop tutorials page.