some tuning

nymea-app/ui/components/Led.qml

@@ -17,11 +17,11 @@ Item {
             switch (root.state) {
             case "on":
             case "green":
-                return "#91dd77";
+                return "#73c0b3";
             case "off":
                 return "lightgray";
             case "orange":
-                return "#dddd77";
+                return "#fedf6f";
             case "red":
                 return "#dd7777"
             }

nymea-app/ui/experiences/heating/Main.qml

@@ -139,6 +139,11 @@ Item {
 
             ColumnLayout {
 
+                Label {
+                    text: qsTr("Current air quality")
+                    font.pixelSize: app.smallFont
+                }
+
                 RowLayout {
                     spacing: app.margins
                     ColorIcon {