Arashi:
I pretty much disagree with Baggronor on this point. Sure, red is awesome on the small blackhearted chaos dwarfs, but you shouldn´t be afraid of using other colours on them. Just like Vampire counts doesn´t need to be red, dark elfs purple or wood elves green, the chaos dwarfs can be whatever you like.
My chaos dwarf blood bowl players are blue and grey, while my normal chaos dwarfs are green and goldish. And for me, I couldn´t be more satisfied. To create your own colour scheme is actually only that as rewarding as modeling your own army. Here you have a few examples of different colourshemes that could help you:
My own: https://discourse.chaos-dwarfs.com/t/5930 (more on p.2)
Krug666 (purple): https://discourse.chaos-dwarfs.com/t/9327
Geckilians BB team (blue and green): http://www.chaos-dwarfs.com/bloodbowl1.php
Golden deamon winners: http://www.chaos-dwarfs.com/golden-demon.php