--- a/calendar/base/themes/gnomestripe/calendar-task-view.css
+++ b/calendar/base/themes/gnomestripe/calendar-task-view.css
@@ -98,17 +98,17 @@
 #calendar-task-details-attachment-rows {
     max-height: 60px;
 }
 
 .task-details-value {
     text-align: left;
     background-color: transparent;
     border: none;
-    color: black;
+    color: WindowText;
 }
 
 #calendar-task-tree {
     min-height: 98px;
     border-left: 1px solid ThreeDShadow;
     border-bottom: 1px solid ThreeDHighlight;
     border-right: 1px solid ThreeDHighlight;
 }

--- a/calendar/base/themes/winstripe/calendar-task-view.css
+++ b/calendar/base/themes/winstripe/calendar-task-view.css
@@ -99,17 +99,17 @@
 #calendar-task-details-attachment-rows {
     max-height: 60px;
 }
 
 .task-details-value {
     text-align: left;
     background-color: transparent;
     border: none;
-    color: black;
+    color: WindowText;
 }
 
 #calendar-task-tree {
     min-height: 98px;
     border-left: 1px solid ThreeDShadow;
     border-bottom: 1px solid ThreeDHighlight;
     border-right: 1px solid ThreeDHighlight;
 }