Graduated Color Filters

Professional photographers put grad filters on their lens to achieve interesting artistic effects. The filter is made of 2 colors that give a color cast on the picture.

Original image
Dark / Emerald

Amber / Emerald
Amber / Violet

Open your image, choose "Grad Filter" tool:

Drag a line to indicate the direction of the filter, usually from the top of the image to the bottom:

Select colors of the filter and intensity:

Click OK to confirm.