From Wikipedia:

Bluey is an Australian preschool animated television series that premiered on ABC Kids on 1 October 2018. The program was created by Joe Brumm and is produced by Queensland-based company Ludo Studio. It was commissioned by the Australian Broadcasting Corporation and the British Broadcasting Corporation, with BBC Studios holding global distribution and merchandising rights. The series made its premiere on Disney Junior in the United States and is released internationally on Disney+.

The font, titled Hello Headline, has been first used in a 2017 pilot episode that was unaired. At the time, the logo for Bluey was only written in Hello Headline as well in the pilot, before the final version of the Bluey logo used the same font as well, albeit modified.

Across the entire show from the intro to the title card, and credits, were all written in Hello Headline.

The 2017 pilot episode title card

The pilot intro

Title card

End credits