Gary,

Was your truck made in the USA or somewhere in (or, made for) a British Commonwealth country (Canada or Australia or South Africa)?

Turquoise was never used on a USA Advance-Design truck. However, some people see turquoise when they see Transport Blue (a 54 color).

I had a 54 pickup painted turquoise- it looks real nice but does not match an original color.

This is supposedly an original Canadian Chevrolet truck color.