CSS 2, SVG and CSS allow web authors to use system colors , which are color names whose values are taken from the operating system , picking the operating system's highlighted text color, or the background color for tooltip controls. This enables web authors to style their content in line with the operating system of the user agent.  The CSS3 color module has deprecated the use of system colors in favor of CSS3 UI System Appearance property,   which itself was subsequently dropped from CSS3. 
THE CUSTOMER ADVANTAGE: Leather watchbands are extremely costly, develop odors, and experience deformation from perspiration. They crack and crease due the deteriorating nature of humid cardboard filler pads… A Rubber B Structure Series™ contains no filler pad: the leather surface fits crease-free and smoothly fused to the shapely rubber base for the entire life of the strap. The wearer no longer worries about the temperature rising, causing them to perspire, and ruin their leather strap. At the end of an active day, a Structure Series™ rubber base can simply be wiped clean with a damp cloth, avoiding any damage to the fine leather surface. No other leather watch bracelet can match the endurance of our Structure Series™ watchbands.