diff --git a/index.js b/index.js
index abaa7fe..c756588 100644
--- a/index.js
+++ b/index.js
@@ -39,7 +39,7 @@ function Color(obj, model) {
 	var i;
 	var channels;
 
-	if (typeof obj === 'undefined') {
+	if (obj == null) { // eslint-disable-line no-eq-null,eqeqeq
 		this.model = 'rgb';
 		this.color = [0, 0, 0];
 		this.valpha = 1;
diff --git a/test/index.js b/test/index.js
index bc563bc..b07a9a0 100644
--- a/test/index.js
+++ b/test/index.js
@@ -16,6 +16,14 @@ it('Color() instance', function () {
 	notStrictEqual(c.rgb(), c.rgb());
 });
 
+it('Color() instance (null)', function () {
+	ok((new Color(null)) instanceof Color);
+});
+
+it('Color() instance (undefined)', function () {
+	ok((new Color(undefined)) instanceof Color);
+});
+
 it('Immutability', function () {
 	var c = Color(0xFF0000);
 	ok(c !== c.rgb());