improve outline color calculations

containment/package/contents/code/ColorizerTools.js

@@ -41,3 +41,8 @@ function colorLuminasFromRGB(r, g, b) {
 
     return 0.2126*rS + 0.7152*gS + 0.0722*bS;
 }
+
+
+function normalize(min, max, per) {
+    return min + ((max-min) * per);
+}

containment/package/contents/ui/colorizer/Manager.qml

@@ -37,7 +37,20 @@ Loader{
     readonly property real themeTextColorBrightness: ColorizerTools.colorBrightness(textColor)
     readonly property real backgroundColorBrightness: ColorizerTools.colorBrightness(backgroundColor)
     readonly property color minimizedDotColor: themeTextColorBrightness > 127.5 ? Qt.darker(textColor, 1.7) : Qt.lighter(textColor, 8)
-    readonly property color outlineColor: backgroundColorBrightness > 127.5 ? Qt.darker(backgroundColor, 1.5) : Qt.lighter(backgroundColor, 3.3)
+
+    readonly property color outlineColorBase: backgroundColor
+    readonly property real outlineColorBaseBrightness: ColorizerTools.colorBrightness(outlineColorBase)
+    readonly property color outlineColor: {
+        if (!root.panelOutline) {
+            return backgroundColor;
+        }
+
+        if (outlineColorBaseBrightness > 127.5) {
+            return Qt.darker(outlineColorBase, 1.5);
+        } else {
+            return Qt.lighter(outlineColorBase, 2.2);
+        }
+    }
 
     readonly property bool mustBeShown: (applyTheme && applyTheme !== theme)