diff --git a/src/traces/waterfall/attributes.js b/src/traces/waterfall/attributes.js
index a4ba4419217..b93a131fa04 100644
--- a/src/traces/waterfall/attributes.js
+++ b/src/traces/waterfall/attributes.js
@@ -11,6 +11,7 @@
 var barAttrs = require('../bar/attributes');
 var lineAttrs = require('../scatter/attributes').line;
 var extendFlat = require('../../lib/extend').extendFlat;
+var Color = require('../../components/color');
 
 function directionAttrs(dirTxt) {
     return {
@@ -94,7 +95,7 @@ module.exports = {
 
     connector: {
         line: {
-            color: lineAttrs.color,
+            color: extendFlat({}, lineAttrs.color, {dflt: Color.defaultLine}),
             width: lineAttrs.width,
             dash: lineAttrs.dash,
             editType: 'plot'
diff --git a/test/image/baselines/waterfall-grouping-vs-defaults.png b/test/image/baselines/waterfall-grouping-vs-defaults.png
index 7c023291515..3f01e329cd8 100644
Binary files a/test/image/baselines/waterfall-grouping-vs-defaults.png and b/test/image/baselines/waterfall-grouping-vs-defaults.png differ
diff --git a/test/image/baselines/waterfall-offsetgroups.png b/test/image/baselines/waterfall-offsetgroups.png
index 63dd5bf28ee..fe465bb8a1b 100644
Binary files a/test/image/baselines/waterfall-offsetgroups.png and b/test/image/baselines/waterfall-offsetgroups.png differ
diff --git a/test/image/baselines/waterfall_11.png b/test/image/baselines/waterfall_11.png
index e0c5465c7a3..6ccb1b4fccc 100644
Binary files a/test/image/baselines/waterfall_11.png and b/test/image/baselines/waterfall_11.png differ
diff --git a/test/image/baselines/waterfall_and_histogram.png b/test/image/baselines/waterfall_and_histogram.png
index c0383c04e3c..089666a61ae 100644
Binary files a/test/image/baselines/waterfall_and_histogram.png and b/test/image/baselines/waterfall_and_histogram.png differ
diff --git a/test/image/baselines/waterfall_cliponaxis-false.png b/test/image/baselines/waterfall_cliponaxis-false.png
index 9b984b005b9..f01724f4dfc 100644
Binary files a/test/image/baselines/waterfall_cliponaxis-false.png and b/test/image/baselines/waterfall_cliponaxis-false.png differ
diff --git a/test/image/baselines/waterfall_line.png b/test/image/baselines/waterfall_line.png
index 7e32aaad93a..8fe9b89a280 100644
Binary files a/test/image/baselines/waterfall_line.png and b/test/image/baselines/waterfall_line.png differ
diff --git a/test/image/baselines/waterfall_multicategory.png b/test/image/baselines/waterfall_multicategory.png
index 1fc8d5b86de..6742ede5bb3 100644
Binary files a/test/image/baselines/waterfall_multicategory.png and b/test/image/baselines/waterfall_multicategory.png differ
diff --git a/test/image/baselines/waterfall_nonnumeric_sizes.png b/test/image/baselines/waterfall_nonnumeric_sizes.png
index 2ddd259f402..8fea4fcf396 100644
Binary files a/test/image/baselines/waterfall_nonnumeric_sizes.png and b/test/image/baselines/waterfall_nonnumeric_sizes.png differ
diff --git a/test/jasmine/tests/waterfall_test.js b/test/jasmine/tests/waterfall_test.js
index c4991efe626..25761ac46cb 100644
--- a/test/jasmine/tests/waterfall_test.js
+++ b/test/jasmine/tests/waterfall_test.js
@@ -202,6 +202,15 @@ describe('Waterfall.supplyDefaults', function() {
         expect(traceOut.xcalendar).toBe('coptic');
         expect(traceOut.ycalendar).toBe('ethiopian');
     });
+
+    it('should coerce connector line color and default to Color.defaultLine', function() {
+        traceIn = {
+            x: [1, 2, 3],
+            y: [1, 2, 3],
+        };
+        supplyDefaults(traceIn, traceOut, defaultColor, {});
+        expect(traceOut.connector.line.color).toBe(color.defaultLine);
+    });
 });
 
 describe('waterfall calc / crossTraceCalc', function() {