Nametag colour vote

It's our nametag colour vote this time.

.. To prevent crashing of nametag colour with the other societies or clubs, we have made a simple survey on their nametags.
As for now, we left with 4 choices.

A. Green

B. Purple

C. Brown

D. Yellow

So, which one is better?

VOTE NOW!!

..

Duty members, Committee members and ALKs will be given this tags.