as blue as sea
fiddle
mule
As dear as salt
my teacher was as surprised as a dog
This is not an idiom. It is comparing one thing to another, so it is a simile. Remember: "AS ___ AS___" means A Simile! It is just saying that something is very black.
Simile: as black as coal.
Historically, the simile has been "deaf as a door post". *NOTE: Today, these kinds of comparisons would be seen as rude.
Coal Ink
fiddle
mule
As dear as salt
simile, it uses 'as'
Niagra Falls morning.
...mule."
like the midnight sky
my teacher was as surprised as a dog
No, this is not a simile. A simile is a figure of speech that compares two different things using the words "like" or "as." In the given phrase, "feeling like black was the thing to be" is not comparing two things.