R1:4fe1d3fc7fc4

[Redesign] Blindigo logo

Summary: Ref T8099. Update logo and font to use Blindigo (tm) color system. Also tweak hover backgrounds a hair.

Test Plan: Photoshop.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T8099

Differential Revision: https://secure.phabricator.com/D12753