Avoid duplicate colours.
The following Merge Request (MR) has been forwarded from GitHub in order to prevent the GNOME Project from losing contributions coming from un-official channels. And for contributors to not see their valuable contributions not being accounted for.
Relevant information:
Github handle: josephw
MR URL: https://github.com/GNOME/gnome-system-monitor/pull/5
Patch URL: https://github.com/GNOME/gnome-system-monitor/pull/5.patch
Body of the MR:
Two of the colours were duplicated in taking this list from https://sashat.me/2017/01/11/list-of-20-simple-distinct-colors/ . Replace the dupe.