If you dig deeper into the materialize.css file then you'll find this, on editing few things from this you can customize the slider-thumb.
Check W3Schools docs on Range sliders, you can customize by changing values like -
border
, height
, width
, border-radius
and many more. Don't forget to override these with the help of !important
.
input[type=range]::-webkit-slider-thumb {
border: 1px solid #000;
height: 20px;
width: 20px;
border-radius: 25% !important;
background: #4826a6 !important;
-webkit-transition: -webkit-box-shadow .3s;
transition: -webkit-box-shadow .3s;
transition: box-shadow .3s;
transition: box-shadow .3s, -webkit-box-shadow .3s;
-webkit-appearance: none;
background-color: #26a69a;
-webkit-transform-origin: 50% 50%;
transform-origin: 50% 50%;
margin: -10px 0 0 0;
}
Customized Range Slider