text: import datetime
  from django import template
  from django.conf import settings
  
  register = template.Library()
  
  
  @register.simple_tag(takes_context=False)
  def meta_tags():
      try:
          return settings.META_TAGS
      except BaseException:
          return ""
  
  
  @register.simple_tag(takes_context=True)
  def color_theme(context):
      try:
          return context['request'].COOKIES["color_theme"]
      except BaseException:
          return "default"
  
  
  @register.simple_tag(takes_context=False)
  def debug_on():
      return settings.DEBUG
  
  
  '''
  @register.simple_tag(takes_context=True)
  def temporal_spectrum(context):
      try:
          return context['request'].COOKIES["temporal_spectrum"]
      except:
          return 'true'
  '''
  