Arrows for incrementing and decrementing hour and minute do not appear blue in color.

[shivajividhale]

The dropdown works fine. However, the up and down arrow to increment/decrement minute and hour does not appear. This is because the color is matching with the background. When I hover over it, the area around it turns grey so the arrow remains white but becomes visible. Same icon in the link (https://eonasdan.github.io/bootstrap-datetimepicker/#linked-pickers) appears fine. How do I fix this?

I can't hover and then take a screenshot as the dropdown goes away. I cannot even inspect the element as clicking on it hides the widget. Any suggestions to inspect the element would be welcome too.