Color is not claimed as a feature of the mark.
The mark consists of a combination of rectangles that spells the word "ill" in lower-case letters. Starting from the far left, a small horizontal rectangle sits on top of a larger, vertical rectangle to form the "i". In the middle, a vertical rectangle forms an "l". To the far right, a vertical rectangle, which is equal in height and width to the middle rectangle, forms the final "l". All rectangles have thick, bolded borders. Color is not claimed as a feature of the mark.