Whenever we see a double rainbow in nature, the colors in the second rainbow are always in reverse order, which means we need to reverse the order of the colors in our gradient. With the Gradient Editor still open, click on the blue color stop directly below the gradient preview bar and drag it towards the left. Then do the same thing with the green and yellow color stops, dragging them towards the left. It doesn’t matter how far you drag them as long as there’s some space between them. This is just to make sure they don’t overlap each other as we reposition them. Leave the red color stop in place: