Do the same with the foreground color by clicking on the front square.This will be your highlight color, bearing in mind you can reverse the gradient in Photoshop anyway. Go to the toolbar and set the background color (click on the rear of the two squares to bring up the color picker pane).This is one method for creating a gradient map:
This one has a cold effect all the way through. Gradient maps don’t have to include radically opposing colors.
