[Bug]: how to set underline color

[GrammyLi]

CheckList

• I agree to follow this project's Code of Conduct
• I have read and followed the Contributing Guide
• I have read and followed the Issue Tracker Guide
• I have searched and referenced existing issues and discussions
• I am filing a BUG report.
• I have managed to reproduce the bug after upgrading to the latest version
• I have created an accurate and minimal reproduction

Version

6.0.2

In What environments are you experiencing the problem?

No response

Node Version (if applicable)

22.4.0

Link To Reproduction

yes

Steps To Reproduce

Expected Behavior

how to set underline color, I can see about to set underline, don't set color

Actual Behavior

how to set underline color, I can see about to set underline, don't set color

Error Message & Stack Trace

[asturur]

I don't think underline has its own color

[GrammyLi]

like this, underline color different word color