Board Thread:Support Requests - Designing Your Wiki/@comment-24204753-20161115181810/@comment-25295528-20161115185712

ul.tabbernav { /* bar that appears under the tabber bar */ border: pixel, state, color !important; /* Color of the tabber bar */ background-color: color; /* Border corners of bar itself */ border-radius: pixel; /* Bar thickness */ height: pixel; }   /*ACTIVE TABBER BUTTON*/ ul.tabbernav .tabberactive a { /* Active button color */ background-color: color !important; /* Border of the button */ border-radius: pixel; border: pixel, state, color !important; /* Active font color */ color: color; top: pixel; }   ul.tabbernav .tabberactive caption a { /* Color of the captions */ color: color; }   /*INACTIVE TABBER BUTTON*/ ul.tabbernav li a { /* Inactive button color */ background-color: color !important; /* Border of the button */ border-radius: pixel; border: pixel, state, color !important; /* Inactive font color */ color: color !important; top: pixel; }   .tabberlive .tabbernav li a:hover { background-color: color; }

These are the main selectors to tabbers. Fill in and customise the properties, using pixels (px), colors (hex or pre defined (i.e red, green, etc) and states (solid, dashed, etc).