renderer: change default primary color to darker green

src/renderer/plugins/vuetify.js

@@ -1,6 +1,8 @@
 import { createVuetify } from 'vuetify/dist/vuetify'
 import { ko, en } from 'vuetify/locale'
 
+import colors from 'vuetify/lib/util/colors.mjs'
+
 export default createVuetify({
   icons: {
     iconfont: 'mdi'
@@ -9,5 +11,21 @@ export default createVuetify({
     messages: { ko, en },
     defaultLocale: 'en',
     fallbackLocale: 'en'
+  },
+  theme: {
+    themes: {
+      light: {
+        dark: false,
+        colors: {
+          primary: colors.green.darken2
+        }
+      },
+      dark: {
+        dark: true,
+        colors: {
+          primary: colors.green.darken4
+        }
+      }
+    }
   }
 })