Bugzilla

Using a dark theme.
If I tag an email as 'Important' then this occurs.

In Thread Pane/Message List:
Text of everything - From, subject, date etc are all coloured Red.
If I select that tagged email in list then all the background changes to red and the text all change to white.

In Message Pane, the selected and opened email shows this:
the 'tag' called 'Important' is displayed with red background and white text.
In Message Pane the headers - From, Subject Date etc of any header does not change. They are all using a white text on dark background as per theme.

This is all working as expected.
If you see the same as me then there is no bug.

But if you requesting an enhancement to change all headers in the Message Pane to use colour of tag for font colour then this is an 'enhancement' request not a 'defect.'

Using a dark theme.
If I tag an email as 'Important' then this occurs.

In Thread Pane/Message List:
Text of everything - From, subject, date etc are all coloured Red.
If I select that tagged email in list then all the background changes to red and the text all change to white.

In Message Pane, the selected and opened email shows this:
the 'tag' called 'Important' is displayed with red background and white text.
In Message Pane the headers - From, Subject Date etc of any header does not change. They are all using a white text on dark background as per theme.

This is all working as expected.
If you see the same as me then there is no bug.

But if you requesting an enhancement to change all headers in the Message Pane to use colour of tag for font colour then this is an 'enhancement' request not a 'defect.'
The would need to be an option to switch on because not everyone would want all the Message Header font colour to chnage when it is already clear a tag has been set.