diff --git a/src/ol/color.js b/src/ol/color.js
index d1807c95c5..0bbe0c06eb 100644
--- a/src/ol/color.js
+++ b/src/ol/color.js
@@ -30,7 +30,7 @@ ol.color.RGB_COLOR_RE_ =
  * @private
  */
 ol.color.RGBA_COLOR_RE_ =
-    /^(?:rgba)?\((0|[1-9]\d{0,2}),\s?(0|[1-9]\d{0,2}),\s?(0|[1-9]\d{0,2}),\s?(0|1|0\.\d{0,10})\)$/i;
+    /^(?:rgba)?\((0|[1-9]\d{0,2}),\s?(0|[1-9]\d{0,2}),\s?(0|[1-9]\d{0,2}),\s?(0|1|0\.\d{0,16})\)$/i;
 
 
 /**
diff --git a/test/spec/ol/color.test.js b/test/spec/ol/color.test.js
index f713de47e8..f8599acbe5 100644
--- a/test/spec/ol/color.test.js
+++ b/test/spec/ol/color.test.js
@@ -81,6 +81,8 @@ describe('ol.color', function() {
     it('can parse rgba colors', function() {
       expect(ol.color.fromString('rgba(255, 255, 0, 0.1)')).to.eql(
           [255, 255, 0, 0.1]);
+      expect(ol.color.fromString('rgba(255, 255, 0, 0.3333333333333333)')).to.eql(
+          [255, 255, 0, 0.3333333333333333]);
     });
 
     it('caches parsed values', function() {