I don't own either of these ponies but I can give you a guesstimate on colors
Star Flight: Looks like possibly DH Water Nixie for the blue, and the pink looks like it's either DH Hearthrob or Bubblegum (possibly old bubblegum)
Heart Bright: Looks like it also might be DH Water Nixie for the blue, Purple I want to say possibly Amethyst, and the pink tail looks like it might be the old bubblegum color