From 96ac817ee0a9ba43e85208958bccb5aed72d7efa Mon Sep 17 00:00:00 2001
From: Hixie <github.com@spam.hixie.ch>
Date: Fri, 24 Jul 2015 18:05:14 -0700
Subject: [PATCH] Fix the lerp the RIGHT way.

---
 sky/sdk/lib/base/lerp.dart | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sky/sdk/lib/base/lerp.dart b/sky/sdk/lib/base/lerp.dart
index b2bbbc974f1..a090290f92a 100644
--- a/sky/sdk/lib/base/lerp.dart
+++ b/sky/sdk/lib/base/lerp.dart
@@ -22,9 +22,9 @@ Color lerpColor(Color a, Color b, double t) {
   if (a == null && b == null)
     return null;
   if (a == null)
-    return _scaleAlpha(a, t);
+    return _scaleAlpha(b, t);
   if (b == null)
-    return _scaleAlpha(b, 1.0 - t);
+    return _scaleAlpha(a, 1.0 - t);
   return new Color.fromARGB(
       lerpNum(a.alpha, b.alpha, t).toInt(),
       lerpNum(a.red, b.red, t).toInt(),