[Newbies] Coloring images with transparant parts

[Matthias Korn]

Hi all,

I have a .png or .gif image (e.g. an ImageMorph) with transparent parts
(e.g. a circle where the outer part is transparent). I now want to have
this one image and color it programmatically with other colors (e.g. the
circle appearing in slight red, green, blue ...).

Is this possible to do with Squeak/Morphic? How?

Thanks,
Matthias