One of the Rockies' team colors is purple which was inspired by the line "For purple mountain majesties" in "America the Beautiful". The shades of the color used by the ball club lacked uniformity until PMS 2685 was established as the official purple beginning with the 2017 season.[21]
The Rockies' home uniform is white with purple pinstripes, and the Rockies are the first team in Major League history to wear purple pinstripes.[22] The front of the uniform is emblazoned with the team name in silver trimmed in black, and letters and numerals are in black trimmed in silver. During the Rockies' inaugural season, they went without names on the back of their home uniforms, but added them for the following season. In 2000, numerals were added to the chest.
The Rockies' road uniform is grey with purple piping. The front of the uniform originally featured the team name in silver trimmed in purple, but was changed the next season to purple with white trim. Letters and numerals are in purple with white trim. In the 2000 season, piping was replaced with pinstripes, "Colorado" was emblazoned in front, chest numerals were placed, and black trim was added to the letters. Prior to the 2012 season, the Rockies brought back the purple piping on their road uniforms, but kept the other elements of their 2000 uniform change.
The Rockies originally wore an alternate black uniform during their maiden 1993 season, but for only a few games. The uniform featured the team name in silver with purple trim, and letters and numerals in purple with white trim. In the 2005 season, the Rockies started wearing black sleeveless alternate uniforms, featuring "Colorado", letters and numerals in silver with purple and white trim. The uniforms also included black undershirts, and for a few games in 2005, purple undershirts. The Rockies retired the black sleeveless uniform in 2022, replacing it with the "City Connect" uniform (see below).
From 2002 to 2011, the Rockies wore alternate versions of their pinstriped white uniform, featuring the interlocking "CR" on the left chest and numerals on the right chest. This design featured sleeves until 2004, when they went with a vest design with black undershirts.
In addition to the black sleeveless alternate uniform, the Rockies also wear a purple alternate uniform, which they first unveiled in the 2000 season. The design featured "Colorado" in silver with black and white trim, and letters and numerals in black with white trim. At the start of the 2012 season, the Rockies introduced "Purple Mondays" in which the team wears its purple uniform every Monday game day, though the team continued to wear them on other days of the week.[23]
Prior to 2019, the Rockies always wore their white pinstriped pants regardless of what uniform top they wore during home games. However, the Rockies have since added alternate white non-pinstriped pants to pair with either their black or purple alternate uniforms at home, as neither uniform contained pinstripes.
The Rockies currently wear an all-black cap with "CR" in purple trimmed in silver and a purple-brimmed variation as an alternate. The team previously wore an all-purple cap with "CR" in black trimmed in silver, and in the 2018 season, caps with the "CR" in silver to commemorate the team's 25th anniversary.
In 2022, the Rockies were one of seven additional teams to don Nike's "City Connect" uniforms. The set is predominantly green and white with printed mountain range motifs adorning the chest. The lettering was taken from the official Colorado license plates. The right sleeve has a yellow patch featuring the shortened nickname "ROX", the "5280" sign representing the altitude of Denver, two black diamonds representing Double Diamond skiing, and the exact longitude and latitude of Coors Field. The left sleeve has the interlocking "CR" in white with green trim, and purple piping was added to represent purple seats at Coors Field. Caps are green with a white panel, featuring a "CO" patch with various Colorado-inspired symbols, including colors from the state flag and mountain ranges. In 2023, the Rockies tweaked their "City Connect" uniform, pairing it with white pants on day games and green pants on night games.[24]