First implementation

qml/Utils/Palette.qml

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+pragma Singleton
+
+import QtQuick 2.12
+
+QtObject {
+    property color backgroundColor: "#F7F5F5"
+    property color textFieldBackgroundColor: "#FFFFFF"
+
+    property color borderColor: "#C7C7C7"
+    property color separatorColor: "#C7C7C7"
+
+    property color primaryLabelColor: "#232323"
+    property color secondaryLabelColor: "#232323"
+    property color indicatorLabelColor: "#A6A6A6"
+
+    property color primaryButtonBackgroundColor: "#003ACE"
+    property color primaryButtonPushedBackgroundColor: "#0031AD"
+    property color primaryButtonTextColor: "#FFFFFF"
+
+    property color secondaryButtonBackgroundColor: "#F7F5F5"
+    property color secondaryButtonPushedBackgroundColor: "#E5ECFF"
+    property color secondaryButtonBorderColor: "#003ACE"
+    property color secondaryButtonTextColor: "#003ACE"
+
+    property color timeSectionBackgroundColor: "#F8F8F8"
+    property color statusSectionBackgroundColor: "#FDD855"
+}

qml/Utils/Ui.qml

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+pragma Singleton
+
+import QtQml 2.12
+import QtQuick 2.12
+import QtQuick.Window 2.12
+
+Item {
+    property real currentWidth: 1024
+    property real currentHeight: 768
+
+    property real referenceWidth: 1024
+    property real referenceHeight: 768
+
+    function scale(size) {
+        const value = Math.max(Math.round(size * Math.min(currentWidth / referenceWidth, currentHeight / referenceHeight)), 1)
+        return value
+    }
+}

qml/Utils/qmldir

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+module Utils
+singleton Palette 1.0 Palette.qml
+singleton Ui 1.0 Ui.qml