Red

Red will always and forever be Renji's color.

Red is the color of his hair.

It's the color of the sunset.

It's the color of the enemy's blood stained on his shinigami robes.

Red is Renji's color because it reminds him of who he is.

What he can't change.

Who he can't be.

Who he can't save.

For now, all he can do is bark at the moon.