Projects/Usability/HIG/Color: Difference between revisions
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* Consider accessibility for users with color vision deficiency (~5% population). | * Consider accessibility for users with color vision deficiency (~5% population). | ||
==Implementation== | ==Implementation== | ||
[http://api.kde.org/4.10-api/kdelibs-apidocs/kdeui/html/classKColorScheme.html KColorScheme] provides | [http://api.kde.org/4.10-api/kdelibs-apidocs/kdeui/html/classKColorScheme.html KColorScheme] provides methods to pick readable colors based on the type of message to convey. | ||
Revision as of 12:51, 2 August 2013
Purpose
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.
Guidelines
- Choose colors by selecting the appropriate theme color or system color. You can use the CheckColorRoles theme to detect bugs regarding the use of system colors in your application.
- Never use color as a primary method of communication, but as a secondary method to reinforce meaning visually.
- Make foreground color contrasting to background.
- Consider accessibility for users with color vision deficiency (~5% population).
Implementation
KColorScheme provides methods to pick readable colors based on the type of message to convey.