Open 4image Admin Panel > Click on Edit Template
Load theme and the Style.css sheet and added
scrollbar-base-color: #HexCode#;
scrollbar-arrow-color: #HexCode#;
scrollbar-track-color: #HexCode#;
scrollbar-highight-color: #HexCode#;
scrollbar-darkShadow-color: #HexCode#;
right below color: #—-; after you change the hex code number to match your theme, just scroll to the bottom and hit save.
