old_contents: # coding: utf-8
  
  from cairosvg import svg2png
  from colour import Color
  from flask import (
      abort, Blueprint, send_from_directory, render_template, Response
  )
  from findaconf import app
  from random import choice, randrange
  
  
  files_blueprint = Blueprint('file_routes', __name__, static_folder='')
  
  
  @files_blueprint.route('/poster.png', methods=['GET'])
  def poster():
  
      # randon backgorund color
      rand_rgb = set([(randrange(97, 160) / 255.0) for i in range(0, 3)])
      bg = Color(rgb=rand_rgb)
  
      # get foreground
      fg = Color(bg.hex)
      variation = randrange(15, 60)
      fg.hue = choice([variation, variation * -1])
  
      # random alpha
      alpha = randrange(4, 7) / 10.0
  
      # create image
      svg = render_template('poster.svg', bg=bg.hex, fg=fg.hex, alpha=alpha)
      return Response(svg2png(bytestring=svg), mimetype='image/png')
  
  
  @files_blueprint.route('/favicon.ico')
  def favicon():
      imgs_path = app.config['SITE_STATIC'].child('favicons')
      return send_from_directory(imgs_path, 'favicon.ico')
  
  
  @files_blueprint.route('/robots.txt')
  def robots():
      return send_from_directory(app.config['SITE_STATIC'], 'robots.txt')
  
  
  @files_blueprint.route('/assets/foundation-icons.<extension>')
  @files_blueprint.route(
      '/assets/webassets-external/foundation-icons.<extension>'
  )
  def foundation_icon(extension):
      bower_path = app.config['BASEDIR'].child('findaconf', 'bower')
      directory = 'foundation-icon-fonts'
      file_name = 'foundation-icons.{}'.format(extension)
      if bower_path.child(directory, file_name).exists():
          return send_from_directory(bower_path.child(directory), file_name)
      else:
          abort(404)
  
new_contents: # coding: utf-8
  
  from cairosvg import svg2png
  from colour import Color
  from flask import (
      abort, Blueprint, send_from_directory, render_template, Response
  )
  from findaconf import app
  from random import choice, randrange
  
  
  files_blueprint = Blueprint('file_routes', __name__, static_folder='')
  
  
  @files_blueprint.route('/poster.png', methods=['GET'])
  def poster():
  
      # randon backgorund color
      rand_rgb = tuple([(randrange(97, 160) / 255.0) for i in range(0, 3)])
      bg = Color(rgb=rand_rgb)
  
      # get foreground
      fg = Color(bg.hex)
      variation = randrange(15, 60)
      fg.hue = choice([variation, variation * -1])
  
      # random alpha
      alpha = randrange(4, 7) / 10.0
  
      # create image
      svg = render_template('poster.svg', bg=bg.hex, fg=fg.hex, alpha=alpha)
      return Response(svg2png(bytestring=svg), mimetype='image/png')
  
  
  @files_blueprint.route('/favicon.ico')
  def favicon():
      imgs_path = app.config['SITE_STATIC'].child('favicons')
      return send_from_directory(imgs_path, 'favicon.ico')
  
  
  @files_blueprint.route('/robots.txt')
  def robots():
      return send_from_directory(app.config['SITE_STATIC'], 'robots.txt')
  
  
  @files_blueprint.route('/assets/foundation-icons.<extension>')
  @files_blueprint.route(
      '/assets/webassets-external/foundation-icons.<extension>'
  )
  def foundation_icon(extension):
      bower_path = app.config['BASEDIR'].child('findaconf', 'bower')
      directory = 'foundation-icon-fonts'
      file_name = 'foundation-icons.{}'.format(extension)
      if bower_path.child(directory, file_name).exists():
          return send_from_directory(bower_path.child(directory), file_name)
      else:
          abort(404)
  
subject: Fix bug in RGB randomizer