Wiring colour ID

[dogwood]

Hi Guys.
Was out yesterday sorting the engine bay wiring.
Found a plain Blue wire, can't seem to find were it goes.
It's got a stud connector on the end, if anyone thinks they know.
It's a 2.0efi Pinto BTW

Looked in the book for insperation......
OK question: In the wiring diagram, is BL, Blue or Black?
I assumed it was Blue, thinking Black may be BK
but can't find a colour code.
So secondry Question, Anyone know or have a colour ID code.

Also see a lot marked SW.....
The only thing I can think of is Sh1t White