1 files changed, 27 insertions, 0 deletions
diff --git a/actionview/lib/action_view/helpers/tags/color_field.rb b/actionview/lib/action_view/helpers/tags/color_field.rb
new file mode 100644
index 0000000000..39ab1285c3
--- /dev/null
+++ b/actionview/lib/action_view/helpers/tags/color_field.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module ActionView
+  module Helpers
+    module Tags # :nodoc:
+      class ColorField < TextField # :nodoc:
+        def render
+          options = @options.stringify_keys
+          options["value"] ||= validate_color_string(value)
+          @options = options
+          super
+        end
+
+        private
+
+          def validate_color_string(string)
+            regex = /#[0-9a-fA-F]{6}/
+            if regex.match?(string)
+              string.downcase
+            else
+              "#000000"
+            end
+          end
+      end
+    end
+  end
+end