In a 2018 interview on The Joe Budden Podcast, Chance was asked if he would change the design for “The Big Day,” which hadn’t come out yet, and he made it pretty clear he was planning to stick with his signature “3” hat.
According to Sirr Waka, when asked what would happen when 4 comes, and if he was going to switch to a 4 hat, he flat-out said “no.” The interviewer responded, “We just stay with the 3?” and Chance responded “yeah.”
Strangely enough, though, in Into The Spiderverse, Miles Morales had a poster hanging in his room, which largely resembles Chance the Rapper’s “Coloring Book” album art. However, in the poster, Chance is wearing a “4” hat. This was apparently supposed to imply that in Miles’ dimension, Chance didn’t create the logo until his fourth album, which is a fun and strange nod to Chance’s many fans.
Source : https://www.distractify.com/p/why-does-chance-the-rapper-wear-3