"Bitterness"

Bitterness is the color of a soiled towel, left to dry but blown facedown into the dirt.
The color of a soiled towel is the sound of the whispering rushes, foretelling a storm heading in soon.
The sound of the whispering rushes is the smell of blood, tainting the night air, filling it with a damp grudge.
The smell of blood is the taste of grit in the mouth, where the tiniest particle stays.
The taste of grit is the look of a ghoul, making one want to retch in disgust.
The look of a ghoul is the feel of your soul decaying away, until there is nothing kind left.