Internal cable, as used in houses, if 4 wire was blue, orange, green and brown, later changed to blue/white paired with white/blue, then similar with orange, again (in 6-wire/3 pair) with green. White normally only occurred in larger size cables, paired with a colour. Probably best to paint it.
Ribbon cable tended to follow the resistance colour code (black, brown, red, orange, yellow, green, blue, violet, grey, white) and then repeat if it was wider.