assign random object color but same for instances

[Vinc3r]

need to take into account instances (so they get same color):

import bpy
import random

def returnRandColor():
    return random.randrange(0, 1000000) / 1000000

for obj in bpy.context.selected_objects:
    obj.color = (returnRandColor(), returnRandColor(), returnRandColor(), 1)

[Vinc3r]

https://github.com/Vinc3r/Blender-Python-Snippets/blob/master/blender-2.8%2B/random-color-on-selected.py

[Vinc3r]

also useful for wireframe > object color