All these links list these numbers as the correct color for your '68. Hope this helps
This color is well documented and listed in Pontiac master parts catalogs. Ames PN431 or N182 Bill Hirsch Auto Reported to be high quality paint. Hirsch lists this is being used through 1972 which is incorrect! Classic Industries Blue Poly 62200 DuPont 181-97219 HI-TECH Engine Coating EN-57 Krylon/Dupli-Color Pontiac Blue Metallic DE 1616 Martin Senour Pontiac Blue No. 636 Performance Years RPE482 Plasti-Kote 227 PPG/Ditzler 13255 POR-15 Pontiac Metallic Blue They recommend a silver base coat first. Paint is reportedly difficult to apply, takes a long time to dry and does not look exactly like the factory color. This color is no longer listed on their website. Rinshed-Mason 266T21 VHT Paints VHT-SP142 Pontiac Blue Metallic
,,, when the flag drops, the bullshit stops . <-- period
