Tinting an image with `imagemagick`
Tinting an image into a specific color can be done with a single command using imagemagick.
If you have an image that needs to be tinted, you can easily do this with imagemagick. First install imagemagick:
> sudo apt-get install imagemagick
Then run this command to convert it:
> convert input.png -colorspace gray -fill green -tint 50 tinted.png