[REF] Use variables for colors in tiki_base.css component Less files.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52880 b456876b-0849-0410-b77d-98878d47e9d5
[REF] Use variables for colors in tiki_base.css component Less files.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52881 b456876b-0849-0410-b77d-98878d47e9d5