Set tooltips' foreground color to black
.bk-button-bar-list .bk-toolbar-button:hover .bk-tip {
z-index: 100;
white-space: nowrap;
- background-color: #fff;
+ background-color: white;
+ color: black;
opacity: 0.95;
border: #e5e5e5 solid 1px;
display: inline-block;
