One thing that’s missing from java 8 javafx slider is the fill that comes from the beginning of the slider to the thumb. You can see this in windows 8 as well as several other operating systems: ios 6 and 7, android, etc.
So by using only CSS, it is not possible to style the fill of the slider, to accomplish this you’d have to create your own skin to use with the slider. And that’s exactly what I did by creating the “FilledSliderSkin”.
With this skin set on the slider you can style its fill color, like so:
.slider .fill { -fx-background-color: #00828b; -fx-padding: 0.333333em; }
.slider .fill:hover { -fx-background-color: #219297; }
You can use this skin to achieve the styles of ios 6, 7 and android sliders.
And here are the screenshots of the slider with a metro style: