antifreeze

Pink antifreeze is usually propylene glycol. It is a bit more environmentally friendly, a bit higher boiling point for a 50:50 mix. However, some ethylene glycol, which is usually green color, can be obtained in pink color. So color won’t distinguish which type you actually have. You will need to read the label of the container it came from.
Either glycol is fine for your car’s internal parts and radiator.