I x I Uniform has changed time and time again in order to meet the interests of it's members.
Black, being the original color will remain as primary, however we are now allowing any other color for use in I x I.
It gets technical however so please pay close attention.
1. As long as at least 75% of your avatar is black, you may have any other color included.
2. Once again, the Black Body Dye or Death Whisper (Consume) is a must regardless.
Here are some examples of a few avatars that pass as I x I uniform. Hopefully this will provide a better understanding of what is and isn't against I x I protocol.
PASSING AVATARS:

Description: This avi is meets the requirements because it has more black than brown. It cuts it close but passes.

Description: This is an ideal example of a great I x I avatar. It has no other colors but black and white, thus passing at a glance. Take note that the white does not exceed the black either; if that were the case then it would not pass.
FAILING AVATARS:

Description: This avatar is not wearing Black Body Dye or Death Whisper (Consume). Even if it were it would still not pass because there are far too many colors other than black.

Description: This avatar looks great but the red exceeds black by far more than 75%.
If some red were taken off and replaced with black it might pass.