<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def color_reducer(c1, c2):
 """Helper function used to add two colors together when averaging."""

    return tuple(v1 + v2 for v1, v2 in itertools.izip(c1, c2))