The color of Andorians, as explained by the source.

Can't argue with "Because."

Andorians are pale blue. Because.

Weird that both Tellar and Andoria are apparently "savagely cold." I wonder if one of the Enterprise writers got confused and mixed them up.

The spare cotton spool thing is, at least, backed up by the odd shape of the Andorrian antennae. It’s also exactly the sort of slapdash, low-budget thing they had to do back in the day.