After configuring Options->Composition->Text Colour (the msgcompose.txt_color value in config editor) Thunderbird with the intent of having my text's colour changed, I noticed that when replying to a message Thunderbird also changes the color of the quoted text. But only for some messages, and sometimes only for part of the quoted emails (e.g. A replied to B, B replied to C and I'm replying to that email and in the compse window the text from what C quotes is black but the text from B and A's quotes gets changed to the color I set). I'm guessing it has something to do with how styles get applied in HTML.
I'd rather have Thunderbird leave the color (and all other formatting for that matter, apart from the line indicating it's a quote) of all quoted text as-is. Is there any way to achieve that?