Remove color-related monkey patches

Sass source maps make these patches obsolete. Remove them and implement
their corresponding functionality using source maps.

Change-Id: Iaa372106bae8e93e41cc2c5b004e23fd5d6fda22
Reviewed-on: http://gerrit.causes.com/36429
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>