There is no real definition of coral so it gets thrown around and applied to everything that might possibly turn pink.
So far I've seen the following genetic combinations used in conjunction with the word coral-
hypo + anery in conjunction with the presence of some pink
hypo + anery + amel in conjunction with the presence of some pink
strawberry + anery in conjunction with the presence of some pink
strawberry + anery + diffused with the possibility of turning pink
line-bred pink ghosts
line-bred pink snows
My hypo opal stripe is pink. Can I call it coral? I mean, I know it's lacking anery (the common gene in all the above examples), but it's still pink.
If it were up to me, coral would apply to JMG's line-bred pink ghosts and snows, and no other corn snake genetic combinations, regardless of how pink the snake may be.