The Color Replace filter replaces a photo's RGB color/Alpha Channel with another RGB color/Alpha Channel.
With this filter in addition to replacing a color with another color you can also replace transparency with a RGB color and vice-versa.
Settings
•Select the original color you want to replace by using the Original color combo-box and the associated color-picker
•Select the new color with which you will replace the original one by using the New color combo-box and the associated color-picker
•To set the tolerance of the color matching algorithm use the Tolerance slider
•The default settings can be restored by pressing the Reset button