Hi Raghavi,
You can add a class to your uploader widget (in the properties) and use this class in your stylesheets to change the styling as desired.
Hope this helps!
.mx-fileinput>input{
display:block!important;/* break */
/*custom stuff for [...] */
background:yellow!important;
}
.mx-fileinput .mx-fileinput-upload-button{
/*custom stuff for [Browse...] */
background:green!important;
}
.mx-fileinput>.mx-fileinput-download-button{
/*custom stuff for [Download] */
background:blue!important;
}
To add to Johans answer, you can check this guide on how to add custom styling to your Mendix app https://docs.mendix.com/howto7/front-end/setup-mendix-ui-framework-with-just-css