Normalize Paste, Remarkup code embed colors
Summary: These currently use different yellows, and more importantly when pygmentized, is hard to read. This lightens up code embeds and pastes.
Review Diviner docs, Pastes, and normal code embeds.
Reviewed By: epriestley
Subscribers: tycho.tatitscheff, Korvin
Differential Revision: https://secure.phabricator.com/D14123