The Behemoth has posted the following image on Twitter:
The colors are representative of the four playable knights of the studio’s most famous game, Castle Crashers. The controllers are, of course, Switch Joy-Cons.
Castle Crashers first launched for Xbox 360 in August 2008, followed by PlayStation 3 in August 2010, PC and Mac in September 2012, and Xbox One in September 2015.
Thanks, Nintendo Everything.
Update 03/15/19 at 1:40 p.m.: The Behemoth has followed up the Switch tease with a PlayStation 4 tease.