class HexValidator < ActiveModel::EachValidator

  def validate_each(record, attribute, value)
    unless value =~ /^#?([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/
      record.errors[attribute] << (options[:message] || I18n.t('yukonisuru.errors.messages.hex'))
    end
  end

end