Double-click the color stop, or click the color swatch in the Stops section of the dialog box. Choose a color, and click OK.
Choose an option from the Color pop‑up menu in the Stops section of the dialog box.
Position the pointer over the gradient bar (the pointer turns into the eyedropper), and click to sample a color, or click anywhere in the image to sample a color from the image.
Drag the corresponding color stop left or right to the location you want.
Click the corresponding color stop, and enter a value for Location in the Stops section of the dialog box. A value of 0% places the point at the far left end of the gradient bar; a value of 100%, at the far right end.