![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Sobo_1909_624.png/220px-Sobo_1909_624.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Sobo_1909_624_-_Cuneus.png/220px-Sobo_1909_624_-_Cuneus.png)
Setting
- Download free software GIMP from http://www.gimp.org/downloads/
- Install and run GIMP on your computer.
Procedure
- Import the target image into GIMP as "embedded"
- Creating new layer and set style "Multiply"
- Paint color target region (If image was gray scale mode, set mode RGB (Image->Mode->RGB))
- Manipulate "Hue-Saturation" (Colors->Hue-Saturation), or "Opacity" of the created layer
- Export image as PNG (File->Export)
Upload it to Commons