Test of System Color Values defined in #CSS 2
▻http://www.iangraham.org/books/xhtml1/appd/update-23feb2000.html
“CSS Level 2 defines several additional color names that represent the special system-specific colors used by the Windowing system for colors such as the #standard text background color, the colors of scrollbars, the color of the title bar in active windows, and so on.” Tags: CSS #couleur #OS standard