Take the tour ×  I have an image which looks like this:  enter
image description here  However the yellow line needs to be red
and the cyan line needs to be green. I have MS Paint and
IrfanView.  How can I change the colors of the yellow and cyan
line without individually selecting all pixels manually?  I.e.
what is a good way of changing all pixels of one color to
another color?  share|improve this question add comment  4
Answers  In games, many years ago we used *.PAL file editors to
change one color per another. This is mostly for if your images
are color indexed. (IE: Gifs are always color indexed)  It was
used (also did again while doing mobile games) to change cloth
colors so to make different enemies using only the memory in
disk of a single one.  There are many tools, but as an example:
Also, you say you use irfanview, there's a plugin:
share|improve this answer add comment  Pick an image editing
program like Photoshop or GIMP (latter one is free), and paint
the line with "Color" mode.  share|impr