In the main window the hover and selected color solution is this in my: userChrome.css file.:

 background-color: #52aaff !important;
 border: 0px solid #000000 !important;}

 color: black !important;
 background-color: #52aaff !important;
 border: 0px solid #000000 !important;}

'''How to change hover color in New Email Windows for email address''' link for screenshots: [https://www.reddit.com/r/Thunderbird/comments/1ga5vwg/how_to_change_hover_color_in_new_email_windows/ Screenshot] Thunderbird version 128.3.1 In the new message window when I move my cursor over the email address list my Windows titlebar orange color shows up as half transparent. When I click on an address it uses my light blue color I use in the main window for hover and selected. #52aaff '''Question''': How to change the hover color in the new email window to match what I have in the main window? In the main window the hover and selected color solution is this in my: userChrome.css file.: /* Folder Pane - hover color, once a row is clicked on it will either display the Windows Titlebar color you choose if you do not specify a color here then the hover color will continue on any other row you hover over. light blue specified */ .container:hover { background-color: #52aaff !important; border: 0px solid #000000 !important;} /* Folder Pane - light blue specified */ li.selected > .container { color: black !important; background-color: #52aaff !important; border: 0px solid #000000 !important;}