Set a default value using the "defaultColorValue" settings namespace attribute. The general idea is often we want set a value of say "-1" and let framework handle it. One such scenario would be if you are changing the color of a ImageView using ColorFilter. When framework receives a "-1" value, framework sets the ImageView ColorFilter to null, restoring the ImageView to original state. Screenshot: https://teameos.slack.com/files/bigrushdog/F09T5S155/screenshot_2015-08-31-04-02-54.png Change-Id: I4ad63576270de344a9e7430d9e63a248d37afd9f Signed-off-by: xyyx <xyyx@mail.ru>