Hello there,

Please refer below on the css classes used to change your docker icons and background:-

Icons

#es.es-docker .btn-docker {

    color: [color of your choice] !important;

}

NOTE: You need to put "!important" rule on the color styling because the template that you used is overriding the docker color style with the "!important" rule.

Background

#es.es-docker {

    background-color: [color of your choice];

}

This should solve your issues. Thanks.