Kansas and adidas have created the 'Limestone' alternate Primeknit football uniforms for the Jayhawks to wear October 22 vs. Oklahoma State.  
"Merging tradition with geologic and geographic significance and innovative technology, the special edition retro look is inspired by KU's world famous "Rock Chalk, Jayhawk" chant, which was adopted by Kansas Athletics in the late 1880's from the University's geology club, along with the Campanile World War II Memorial and other buildings around the campus that are built from limestone." -Kansas Athletics
You see Kansas wordmark and player numbers featured in a limestone brick pattern graphic and highlighted with metallic red outlining on the chest of the navy jersey.  The limestone brick continues onto the baselayer and helmet decals for the Jayhawks.