Python - unindent does not match any outer indentation level

# rojo verde azul colores primario

RGB(120,50,50)

import pygame, sys

from pygame.locals import *

color = (0,140,60)

pygame.init()

venta = pygame.display.set_mode((400,300))

pygame.display.set_caption("hey mi nueva ventana")

while True:

   ventana.fill(Color)

   for evento in pygame.event.get():

      if evento.type == QUIT:

          sys.exit()

  pygame.display.update()

File "juegopy.py", line 17

    pygame.display.update()

                          ^

IndentationError: unindent does not match any outer indentation level