Lastly we need to mention css properties that take...

# tornadofx

[edvin]

Lastly we need to mention css properties that take multiple values, and that's why you have to use background += color. Also that multiple values can be assigned with background = multi(color1, color2). The stylesheet conveniently tells you what properties accept multiple values, which is another advantage of the type safe css builder compared to plain text stylesheets.