Fixes inverted header styles

src/definitions/elements/header.less

@@ -253,40 +253,40 @@ h5.ui.header {
 --------------------*/
 
 .ui.inverted.black.header {
-  background-color: @white !important;
-  color: @black !important;
+  background-color: @black !important;
+  color: @white !important;
 }
 .ui.inverted.blue.header {
-  background-color: @white !important;
-  color: @blue !important;
+  background-color: @blue !important;
+  color: @white !important;
 }
 .ui.inverted.green.header {
-  background-color: @white !important;
-  color: @green !important;
+  background-color: @green !important;
+  color: @white !important;
 }
 .ui.inverted.orange.header {
-  background-color: @white !important;
-  color: @orange !important;
+  background-color: @orange !important;
+  color: @white !important;
 }
 .ui.inverted.pink.header {
-  background-color: @white !important;
-  color: @pink !important;
+  background-color: @pink !important;
+  color: @white !important;
 }
 .ui.inverted.purple.header {
-  background-color: @white !important;
-  color: @purple !important;
+  background-color: @purple !important;
+  color: @white !important;
 }
 .ui.inverted.red.header {
-  background-color: @white !important;
-  color: @red !important;
+  background-color: @red !important;
+  color: @white !important;
 }
 .ui.inverted.teal.header {
-  background-color: @white !important;
-  color: @teal !important;
+  background-color: @teal !important;
+  color: @white !important;
 }
 .ui.inverted.yellow.header {
-  background-color: @white !important;
-  color: @yellow !important;
+  background-color: @yellow !important;
+  color: @white !important;
 }
 
 .ui.inverted.block.header {