/usr/share/squirrelmail/themes/minimal_bw.php is in squirrelmail 2:1.4.23~svn20120406-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35  | <?php
/**
 * Date:         July 26, 2003
 * Theme Name:   'Minimal BW Theme'
 *
 * This theme uses black color for text and white for background.
 *
 * Problem: $color[9] is used for background and for disabled links.
 *
 * @author Tomas Kuliavas
 * @copyright 2003-2012 The SquirrelMail Project Team
 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
 * @version $Id: minimal_bw.php 14248 2012-01-02 00:18:17Z pdontthink $
 * @package squirrelmail
 * @subpackage themes
 */
    global $color;
    $color[0]   = '#ffffff'; // (white)   TitleBar
    $color[1]   = '#000000'; // (black)   (unused)
    $color[2]   = '#000000'; // (black)   Warning/Error Messages
    $color[3]   = '#ffffff'; // (white)   Left Bar Background
    $color[4]   = '#ffffff'; // (white)   Normal Background
    $color[5]   = '#ffffff'; // (white)   Table Headers
    $color[6]   = '#000000'; // (black)   Text on left bar
    $color[7]   = '#000000'; // (black)   Links
    $color[8]   = '#000000'; // (black)   Normal text
    $color[9]   = '#ffffff'; // (white)   Darker version of #0
    $color[10]  = '#ffffff'; // (white)   Darker version of #9
    $color[11]  = '#000000'; // (black)   Special Folders color
    $color[12]  = '#ffffff'; // (white)   Alternate color for message list
    $color[13]  = '#000000'; // (black)   Color for quoted text -- > 1 quote
    $color[14]  = '#000000'; // (black)   Color for quoted text -- >> 2 or more
    $color[15]  = '#000000'; // (black)   Unselectable folders
 |