Does this particular shade of blue have a name?

I’m looking for the name of a certain shade of blue that is particularly lightfast.

You know…when you walk by a store that’s left posters in their windows for too long?
All the other colours have faded from being exposed to the sun.
Except for that one particular shade of blue. Does it have its own name?

BONUS QUESTION:
Does it have its own name in reference to this particular quality?
As in, do people who deal with this type of thing (ie lightfastness in ink dyes)
have their own name for this colour within their industry?

No lurve for answering faded poster blue.