Specify text color to improve dark theme support, refs #1128

src/Monolog/Formatter/HtmlFormatter.php

@@ -58,7 +58,7 @@ class HtmlFormatter extends NormalizerFormatter
             $td = '<pre>'.htmlspecialchars($td, ENT_NOQUOTES, 'UTF-8').'</pre>';
         }
 
-        return "<tr style=\"padding: 4px;text-align: left;\">\n<th style=\"vertical-align: top;background: #cccccc\" width=\"100\">$th:</th>\n<td style=\"padding: 4px;text-align: left;vertical-align: top;background: #eeeeee\">".$td."</td>\n</tr>";
+        return "<tr style=\"padding: 4px;text-align: left;\">\n<th style=\"vertical-align: top;background: #ccc;color: #000\" width=\"100\">$th:</th>\n<td style=\"padding: 4px;text-align: left;vertical-align: top;background: #eee;color: #000\">".$td."</td>\n</tr>";
     }
 
     /**