Seems like some colors are truly universal for some (western) countries.
Read some threads here have some colors that are the same as it were for me.

Here were mine:
Red - German (mother tongue)
Orange (or Yellow) - English (2nd lang) Blue - Math
Green - Nature Sciences
Yellow - IT/wood-working (depending on school year)
Purple (or adjacent) - Religion or Ethics (Ethics for non-christian students)