The battered Rebel helmets littering the Geonosis tunnels are modeled off the same ones seen in Star Wars: Episode VI - Return of the Jedi (1983) and Rogue One: A Star Wars Story (2016). They are frequently worn by Saw Gerrera's fighters in The Clone Wars (2008-2020) and The Bad Batch (2021).
Saw Gerrera had piercing blue eyes when he first appeared in Star Wars: The Clone Wars (2008). His live action incarnation in Rogue One: A Star Wars Story (2016) has brown eyes. The Rebels version is somewhere in the middle, with green eyes.
The B1 Battle Droid patrolling the tunnels are a literal mix of the standard tan units, and the Geonosian red units.