Per the CRG Report 1967-1969 Camaro OEM Window Glass; "Soft-Ray Added to tinted GM OEM glass. Soft-Ray is a GM tradename and is not used for other OEM tinted glass. Tinted OEM glass of this era was green in color, whereas current Soft-Ray glass is blue."

And, yes, the options Soft-ray glass - all windows and Soft-ray glass - windshield only should be in code 53 on the PHS. At least it is on my '68 records.