Thread:TheFlamingScyther/@comment-25444898-20150101015548/@comment-4093673-20150110013552

In GIMP, you can have multiple windows open. You can paste the picture into one window and then use the pipette tool to extract the colour you want(can be used by ctrl+click).

Also, try to avoid pure black outlines by all means. Almost nothing is ever purely black and this looks very unnatural.