Factory Screw Up On Paint ????

Take it to a body shop or paint supplier and have them hold the color chips next to it.

That said, an alpine white car painted shortly after a light beige one would probably be somewhat of a mix between the two. Those two shades would have likely shared the same paint line and it's proven that the paint systems weren't cleaned perfectly between color changes.

This is HIGHLY evident on any white car that follows a red one! Hence the different paint lines.