gtk colors now inherited

.config/gtk-3.0/shared.css

@@ -3,18 +3,38 @@
  * https://ubuntu-mate.community/t/enabling-the-gtk-inspector-to-find-css-values-for-theme-styles/20150
 */
 
+/************* 
+ * base states
+ *************/
+
+.background {
+    color: @fg_color;
+    background: @bg_color;
+}
+
+/* inherit colors from parent */
+* {
+    background-color: inherit;
+    color: inherit;
+}
+
+selection,
+*:selected:selected,
+*:selected:focus {
+    background-color: @acc1_color;
+    color: @bg_color;
+}
+
+
+/*
 * {
     border-color: @bg_color;
     border-style: solid;
 
     -GtkTreeView-expander-size: 11;
 }
-/*
-viewport {
-    background: @bg_color;
-    color: @fg_color;
-}
 */
+
 selection,
 *:selected:selected,
 *:selected:focus {
@@ -38,11 +58,6 @@ label {
     -gtk-icon-effect: dim;
 }
 
-.background {
-    color: @fg_color;
-    background: @bg_color;
-}
-
 .view,
 .cell {
     background: @bg_color;