The Warner Bros and DC Comics logos (2016-2021) are colored red and blue; they are also set against the sky and are brushed by a red cape.
The DC Comics logo (2015) features a comic-book image of Supergirl.
An updated DC Comics logo was introduced in 2016 that was colored red and blue.
Two episodes, The House of L (2019) and Red Dawn (2019), which majorly involve the Red Daughter (a clone of Supergirl raised in the Russian region of Kaznia), have a different title card for her appear briefly ("Red Daughter" in Russian with her shield symbol) before changing back to Supergirl's original title card.