[FEATURE REQUEST] modify highlight color of text

## Description
The highlighted color of the website remains the default.


**Describe the solution you'd like**
To align with the design scheme, we should change the background color to green of Moksh and text color to white.

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

## Additional Information

**Context**
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**Potential Implementation** (optional)
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**Screenshots or Mockups** (optional)
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