My grandson has vomited 4 times with the last one having blood in it. No fever turned blue and couldn't breathe for about 5-6 sec.

Hospital NOW!!

I agree with Ben. Hospital NOW. Turning blue means he is not getting oxygen which can cause damage to certain organs such as the brain depending on his age.

Vomiting blood is a sign of internal bleeding.

Hope you are currently in the waiting room of your local ER.