diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 91e666d7f47..6269e374180 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -79,7 +79,6 @@ Style/FetchEnvVar:
 Style/FormatStringToken:
   Exclude:
     - 'config/initializers/devise.rb'
-    - 'lib/paperclip/color_extractor.rb'
 
 # This cop supports unsafe autocorrection (--autocorrect-all).
 Style/GlobalStdStream:
diff --git a/lib/paperclip/color_extractor.rb b/lib/paperclip/color_extractor.rb
index d2f7e7c6025..8b8189a849b 100644
--- a/lib/paperclip/color_extractor.rb
+++ b/lib/paperclip/color_extractor.rb
@@ -183,7 +183,7 @@ module Paperclip
     end
 
     def rgb_to_hex(rgb)
-      format('#%02x%02x%02x', rgb.r, rgb.g, rgb.b)
+      format('#%<red>02x%<green>02x%<blue>02x', red: rgb.r, green: rgb.g, blue: rgb.b)
     end
   end
 end