Considers contrast when setting task bg color

app/assets/javascripts/backlogs/show_main.js

@@ -48,5 +48,6 @@ jQuery(function ($) {
       defaultDialogColor = $('#work_package_').css('background-color');
     }
     $(this).parents('.ui-dialog').css('background-color', selected.attr('color') || defaultDialogColor);
+    $(this).parents('.ui-dialog').colorcontrast();
   });
 });

app/assets/stylesheets/backlogs/taskboard.css.erb

@@ -320,6 +320,14 @@ See doc/COPYRIGHT.rdoc for more details.
   border:none;
 }
 
+.dark #task_editor label {
+  color: #FFFFFF;
+}
+
+.light #task_editor label {
+  color: #000000;
+}
+
 /* item editor */
 #task_editor label {
   display:block;