.text-area, 
.text-area .scroll-pane,  
.text-area .scroll-pane .viewport, 
.text-area .scroll-pane .content {
    -fx-background-color: transparent;
}
 
.scroll-pane,  
.scroll-pane .viewport, 
.scroll-pane .content {
    -fx-background-color: transparent;
}
