set tootip text color explicitly
@tooltipBorder: #e5e5e5; /* Same border color used everywhere */
@tooltipColor: white;
+@tooltipText: #2f2f2f;
@tooltipArrowColor: #909599; /* Gray of icons */
@tooltipArrowWidth: 10px;
position: absolute;
padding: 5px;
border: 1px solid @tooltipBorder;
+ color: @tooltipText;
background-color: @tooltipColor;
pointer-events: none;
opacity: 0.95;
