gtk2/tests/testgtk.css

/* testgtk2.css sets all the buttons in the main window to blue by default */
@import url("testgtk2.css");

@binding-set entry-bindings {
    bind "<alt>s" { "move-cursor" (visual-positions, 3, 0) };
    bind "<alt>a" { "move-cursor" (visual-positions, -3, 0) };
}

* {
    font-family: Sans;
    font-size: 12px;
}

label:selected {
    background-color: gray;
}

label:hover {
    background-color: mix (#a0a0a0, rgb (75%, 200, 0%), 0.9);
}

/* override testgtk2, introduce the green color in the button list */
#main_window scrolledwindow button:hover {
    background-color: rgb (0%, 75%, 0);
}

entry {
    -gtk-key-bindings: entry-bindings;
}