The color will gradually change from black to blue between the bottom and the stop at 46 percent: background: -webkit-gradient( linear, left bottom, left top, color-stop(0, rgb(0, 0, 0)), color-stop(0 ...

If the foreground is white and the background is black then the results will be different when you add the Gradient adjustment layer and you will need to do an additional step to get the correct ...