Always tell customer you will match close as possible when using vinyl. No need for stress over this. I get so tired of people holding us sign folk to strict pms codes when nothing else they have matches
If there was a sign union I would vote you for president.
This happened many years ago:
Client had to have the EXACT match to a PMS code. Nothing else would do. period. So I called a manufacturer and they said sure, we'll do whatever you want. Minimum order is 12,000 square feet.Once I told the client he said: "How 'bout we snap open those color charts again".