<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title></title><style type="text/css">.felamimail-body-blockquote {margin: 5px 10px 0 3px;padding-left: 10px;border-left: 2px solid #000088;} </style></head><body>Layout > Color<br>* Do not use color as primary method of communication.<br>http://techbase.kde.org/Projects/Usability/HIG/Color<br><br>==Purpose==<br>Color is a basal quality in human perception. Color can be used for communication, it is a very efficient way to direct attention, and significance can assigned to an object with color. However, color is a historical and cultural phenomenon, and is subject of continuous aesthetical changes. Furthermore, it should be taken into consideration that a rather high percentage of population has a perception disorder ranging from difficulties to discriminate between red and green to complete color blindness.<br><br>==Guidelines==<br>* Choose colors by selecting the appropriate theme color or system color.<br>* Never use color as a primary method of communication, but as a secondary method to reinforce meaning visually.<br>* Make foreground color contrasting to background.<br>* Consider accessibility for users with color vision deficiency (~5% population).<br>==Implementation==<br><br></body></html>