Rename backgroundColors to backgroundColor

src/plugins/backgroundColor.js

@@ -0,0 +1,18 @@
+import _ from 'lodash'
+
+export default function({ values, variants }) {
+  return function({ addUtilities, e }) {
+    const utilities = _.fromPairs(
+      _.map(values, (value, modifier) => {
+        return [
+          `.${e(`bg-${modifier}`)}`,
+          {
+            'background-color': value,
+          },
+        ]
+      })
+    )
+
+    addUtilities(utilities, variants)
+  }
+}