bug: Captions Settings texts not visible.

[abhirupPann]

Describe the bug
Caption setting texts not visible.

To Reproduce
Steps to reproduce the behavior:

1. Open any video
2. Click on caption button
3. Go to caption settings
4. Turn into light mode.

Expected behavior
The text should be visible.

Screenshots or GIFs
If applicable, add screenshots

Info (please complete the following information):

• Browser - Chrome, Brave
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

[Aman-Sigroha]

I would like to work on this. The solution is very simple: change the constant value of the color to a variable value that is already defined (' hsl(var(--primary)); ') which changes by changing the theme(dark or light). After changing the values, the end result would look like this.

Please assign this task to me.