Reviewed and approved color-nnn.xht tests and
correspondent reftests, with some being
created by R. Hauck.

Changed 1in (width and height) to 100px.

Reused the same pass/fail conditions sentence
in all tests.

Replaced <br /> with a vertical margin of 10px.

More info/explanations:
http://lists.w3.org/Archives/Public/public-css-testsuite/2013Feb/0075.html