[Anthem]

Kobo Wi Fi:
Kobo eReader User Guide: "The status light turns blue when your eReader is fully charged."; " The light is red/violet when your eReader is charging. When the light turns blue your eReader is fully charged."

Kobo eReader Quick Start Guide: "Status Indicator Light: Red/violet indicates charging. Blue indicates full charge."

(Aren't you glad we aren't in the draconian original Kobo days anymore?)