GTK3：更改欄的顏色在GtkLevelBar

Question

如，改變這一形象在藍色橫條另一種顏色：https://developer.gnome.org/gtk3/stable/levelbar.png

最近我已經能夠得到的是設置背景顏色與.level-bar { background-color: red; }，這給了我這個：http://i.imgur.com/q5prtp1.png。

foreground-color: doens't exists，and color: does not do anything。

Answer 1

好了，終於找到了答案......

@define-color color #FF2222; 

.level-bar.fill-block { 
    border-color: shade(@color, 0.85); 
    background-image: linear-gradient(to bottom, shade(@color, 1.2), @color 75%, shade(@color, 0.95)); 
} 

.level-bar.fill-block.empty-fill-block { 
    border-color: alpha(#000000, 0.1); 
    background-color: transparent; 
    background-image: none; 
}