Reset color 3 to be the default color.

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rename : css-color-3/Makefile => css-color/Makefile
rename : css-color-3/Overview.html => css-color/Overview.html
rename : css-color-3/Overview.src.html => css-color/Overview.src.html
rename : css-color-3/issues-lc-2008.html => css-color/issues-lc-2008.html

Author: tabatkins