diff --git a/src/Monolog/Formatter/HtmlFormatter.php b/src/Monolog/Formatter/HtmlFormatter.php
index d853547b..f07c8715 100644
--- a/src/Monolog/Formatter/HtmlFormatter.php
+++ b/src/Monolog/Formatter/HtmlFormatter.php
@@ -30,9 +30,9 @@ class HtmlFormatter extends NormalizerFormatter
         Logger::NOTICE    => '#3a87ad',
         Logger::WARNING   => '#c09853',
         Logger::ERROR     => '#f0ad4e',
-        Logger::CRITICAL  => '#b94a48',
-        Logger::ALERT     => '#d9534f',
-        Logger::EMERGENCY => '#ffffff',
+        Logger::CRITICAL  => '#FF7708',
+        Logger::ALERT     => '#C12A19',
+        Logger::EMERGENCY => '#000000',
     );
 
     /**