Color code and name please

[gcm]

So I found a 1977 GMC shorty can all metal body rust free that also happens to be a fairly rare colour for a van it’s that seafoam colour 70s GM Trucks were known for. Now the attached picture is not my truck in my searching for the colour I stumbled on the that colour which is literally the same colour. But when I do a search on Google I don’t see the colour name or code. If anyone can help I’d appreciate it very much and my apologies for using a picture that is not mine . Thank you and take care