Index: node_modules/d3-scale-chromatic/src/sequential-multi/sinebow.js
===================================================================
--- node_modules/d3-scale-chromatic/src/sequential-multi/sinebow.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-scale-chromatic/src/sequential-multi/sinebow.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,14 @@
+import {rgb} from "d3-color";
+
+var c = rgb(),
+    pi_1_3 = Math.PI / 3,
+    pi_2_3 = Math.PI * 2 / 3;
+
+export default function(t) {
+  var x;
+  t = (0.5 - t) * Math.PI;
+  c.r = 255 * (x = Math.sin(t)) * x;
+  c.g = 255 * (x = Math.sin(t + pi_1_3)) * x;
+  c.b = 255 * (x = Math.sin(t + pi_2_3)) * x;
+  return c + "";
+}