From a38dbea7b4fd8f41eba77dd7e8a5e607e103480d Mon Sep 17 00:00:00 2001
From: samreid <reids@colorado.edu>
Date: Tue, 24 Nov 2020 10:31:35 -0700
Subject: [PATCH] Add ColorProperty, see
 https://github.com/phetsims/axon/issues/221

---
 js/util/ColorProperty.js | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 js/util/ColorProperty.js

diff --git a/js/util/ColorProperty.js b/js/util/ColorProperty.js
new file mode 100644
index 000000000..66475b712
--- /dev/null
+++ b/js/util/ColorProperty.js
@@ -0,0 +1,32 @@
+// Copyright 2020, University of Colorado Boulder
+
+import Property from '../../../axon/js/Property.js';
+import merge from '../../../phet-core/js/merge.js';
+import Color from './Color.js';
+import scenery from '../scenery.js';
+
+/**
+ * Convenience type for creating Property<Color>
+ *
+ * @author Sam Reid (PhET Interactive Simulations)
+ */
+class ColorProperty extends Property {
+
+  constructor( color, options ) {
+
+    // client cannot specify superclass options that are controlled by this type
+    if ( options ) {
+      assert && assert( !options.hasOwnProperty( 'valueType' ), 'ColorProperty sets valueType' );
+      assert && assert( !options.hasOwnProperty( 'phetioType' ), 'ColorProperty sets phetioType' );
+    }
+
+    options = merge( {
+      valueType: Color,
+      phetioType: Property.PropertyIO( Color.ColorIO )
+    }, options );
+    super( color, options );
+  }
+}
+
+scenery.register( 'ColorProperty', ColorProperty );
+export default ColorProperty;
\ No newline at end of file