R1:ab4207a2c5f9

Darken footer color

Summary: Ref T6792, uses slightly darker color as a base.

Test Plan: n/a

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6792

Differential Revision: https://secure.phabricator.com/D11022