How do you know what your skin colour is?

[Boscoforever]

I really want to buy a tarte concealer. But there are so many shades!
Is there a way of knowing if you are pink/yellow/neutral undertones etc?

Have a look at your veins on the inside of your wrists and then have a read at this www.sarahnajafi.com/foundation-101-whats-undertone/