Yes, especially if that is the very first egg.but don't be surprised if the color changes some
ETA...Oh, just realized title says third egg....third egg from that bird, or all the birds?
I would.I wouldn't want to break it open!
Open up and immediately peel the inner white membranes off to see if that color is all the way thru the shell.
You can still keep the shell halves for posterity.