Describe the bug
When we select the options in Quests, its background color changes to rgb(15, 41, 70, 0.8) which becomes indistinguishable against dark background.
In some quests, It becomes difficult to find out whether the option got selected or not due to dark blue or deep color background.
To Reproduce
Go to any quest with dark color background and try to select the options.
Expected behavior
The selected option is clearly visible and distinguishable.
Screenshots

Desktop (please complete the following information):
- OS: Windows
- Browser: Chrome
- Browser Version: 81.0.4044.122 (Official Build) (64-bit)