According to the Earth Science Reference Table, what star is the most blue?
I don't know if this is according to your source, but:
The star Naos, which was designated ζ (zeta) in Argo Navis, ended up as ζ Puppis. In a pair of binoculars, you can tell at a glance that Naos is hot because of its remarkably blue color. A blue star is a hot star, and the outer atmosphere of Naos measures a blazing 42,000 K, an astonishing temperature.