49ers Color Rush TNF uniform will be black, red alternate - Niners Nation
San Francisco 49ers uniform: Team unveils new black alternate - Sports Illustrated
49ers officially unveil black, red and gold alternate uniform for 2015 - Niners Nation
Ranking the current alternate uniforms of every NFL team
49ers Unveil Alternate Throwback Uniforms at Annual State of the Franchise Event
LOOK: Raiders make fun of 49ers new all-black uniforms
NFL Color Rush - Wikipedia
49ers to Wear Black Alternate Uniforms vs. Minnesota Vikings
San Francisco 49ers reveal first-ever alternate jerseys on Snapchat