<human>:  prevent color of white or black using colorsys.
<bot>: Here is a Python function to prevent color of white or black using colorsys
import sys

import colorsys

def _prevent_color(color):
  """Prevent color of white or black using colorsys."""
  if color == "white":
    return "black"
  elif color == "black":
    return "white"
  else:
    return color

# Enter the color
color = "white"

# Calling the function
print((_prevent_color(color)))

#Example Output
# black

#Remember to inspect code for bugs.