Add normal hsl and hsla functions

src/qml/Theme.qml

@@ -2,6 +2,7 @@
 // This file is part of harmonyqml, licensed under LGPLv3.
 
 import QtQuick 2.12
+import "utils.js" as Ut
 
 QtObject {
     id: theme
@@ -44,6 +45,7 @@ QtObject {
         property color foregroundDim2: Qt.hsla(0, 0, 0.3, 1)
         property color foregroundError: Qt.hsla(0.95, 0.64, 0.32, 1)
         property color textBorder: Qt.hsla(0, 0, 0, 0.07)
+        property color accent: Ut.hsl(160, 62, 55)
     }
 
     property QtObject controls: QtObject {

src/qml/utils.js

@@ -1,6 +1,18 @@
 // Copyright 2019 miruka
 // This file is part of harmonyqml, licensed under LGPLv3.
 
+
+function hsl(hue, saturation, lightness) {
+    return hsla(hue, saturation, lightness, 1.0)
+}
+
+
+function hsla(hue, saturation, lightness, alpha) {
+    // Convert standard hsla(0-360, 1-100, 1-100, 0-1) to Qt format
+    return Qt.hsla(hue / 360, saturation / 100, lightness / 100, alpha)
+}
+
+
 function arrayToModelItem(keys_name, array) {
     // Convert an array to an object suitable to be in a model, example:
     // [1, 2, 3] → [{keys_name: 1}, {keys_name: 2}, {keys_name: 3}]