You will find all the styles for these components instyles/jss/nextjs-material-kit-pro/components/parallaxStyle.js
.
If you want a nice parallax like that in our demo pages, you can add the following code at the beginning of your page.
import Parallax from "components/Parallax/Parallax.js";
<Parallax filter image={require("path/to/your/image")} />
Parallax.propTypes = {
className: PropTypes.string,
filter: PropTypes.bool,
children: PropTypes.node,
style: PropTypes.string,
image: PropTypes.string
};