These are the stock bee-hive springs (not dual springs):
New they may have been blue or yellow but, not with miles ;o)
Aftermarket depends on brand. These are BTR dual spring .660 with titanium retainers:
GMPP (Chevy):
Bee-hive next to a dual spring:
Some aftermarket springs can be a bee-hive design, thus it depends...
Hope that helps...
-Don