The league championship round of playoffs for Major League Baseball began Friday night, and Reddit user isiramteal noticed something similar between the four teams remaining and posted an image in the Baseball community.

That’s right, the caps worn by the Toronto Blue Jays, the Chicago Cubs, the Kansas City Royals and the New York Mets all sport the same royal blue shade. Such a monochromatic display makes you long for the days when baseball teams took a few more colorful risks with the design of their uniforms.

A Houston Astros jersey from the 1980s and a replica 1978 San Diego Padres jersey.

ESPN sports business reporter Darren Rovell also tweeted a fun fact about this year’s blue crew (before the Mets beat the Dodgers on Thursday):

All 4 teams in the championship league series will wear same color hat for 1st time: Royal Blue pic.twitter.com/HkT5mGkr1V — Darren Rovell (@darrenrovell) October 15, 2015

The league championship round has only been around since 1969. Know who won the World Series in its first year of implementation? The Mets.