.tabbed-editor > .tab-header-area > .tab-header-background {
    -fx-background-color: hsb(0, 0%, 50%);
}

.tabbed-editor > .tab-header-area .tab {
    -fx-border-width: 0 0 2 0;
    -fx-border-color: hsb(0, 0%, 30%);
}
.tabbed-editor > .tab-header-area .bj-tab-error .tab-label {
    -fx-border-width : 0 0 2 0;
    -fx-border-color: red;
}
.tabbed-editor > .tab-header-area .moe-tab:selected {
    /* Remove border at bottom of tab when selected: */
    -fx-background-color: rgb(225, 225, 225) !important;
    -fx-border-color: transparent !important;
}
.tabbed-editor > .tab-header-area  {
    -fx-padding: 2 5 -1 5;
}

.tabbed-editor .tab-close-button:hover {
    -fx-background-color: darkred;
}



editor-tabs.css



0 HTM Commands = 
green / bluej / lib / stylesheets / editor-tabs.css