diff --git a/benchmark/format-message.js b/benchmark/format-message.js
index 80aaa4b..09c0730 100644
--- a/benchmark/format-message.js
+++ b/benchmark/format-message.js
@@ -3,7 +3,15 @@
 const benchmark = require('benchmark')
 const messageFormatFactory = require('../lib/messageFormatFactory')
 
-const formatMessageColorized = messageFormatFactory(true)
+const colors = {
+  60: 'red',
+  50: 'red',
+  40: 'yellow',
+  30: 'green',
+  20: 'blue',
+  10: 'cyan'
+}
+const formatMessageColorized = messageFormatFactory(true, colors, true)
 const log = {
   time: Date.now(),
   level: 30,
diff --git a/lib/messageFormatFactory.js b/lib/messageFormatFactory.js
index 8714304..6eaa6a6 100644
--- a/lib/messageFormatFactory.js
+++ b/lib/messageFormatFactory.js
@@ -3,12 +3,10 @@ const formatDate = require('./formatDate')
 const colorizerFactory = require('pino-pretty').colorizerFactory
 
 const messageFormatFactory = (levels, colors, useColors) => {
-  const customColors =
-    colors != null
-      ? Object.entries(colors).reduce((colors, [level, color]) => {
-        return [...colors, [level, color]]
-      }, [])
-      : undefined
+  let customColors
+  if (colors != null) {
+    customColors = Object.entries(colors)
+  }
   const colorizer = colorizerFactory(useColors, customColors)
 
   const levelLookUp = {