This Is Why Japan Has Blue Traffic Lights Instead of Green

Blue traffic lights is what happens when you have one word for two colors.

Reader's Digest

@janPolijan let me translate the sitelen pona:
laso a!
green/blue!

kule pi toki pona li sama kule pi ma Nijon/Nipon anu seme?
colors in Toki Pona are colors in Japan or what?