Really it is a garage and IMO really just stick with the same why make life more complicated than it needs to be. If you are like most the walls will be covered with stroage, bikes skis all kinds of stuff so the walls will barely be seen

Just use an exterior paint for easier cleanup.

Use the same color. It's easier to have only one can of touch up paint. The garage paint color is not the place to complicate life.

Color doesn’t have to be consistent, but sheen and durability should be different from what is used in the interior. Link below is very helpful and also has color suggestions that will better handle scuffs/wear and tear vs white.

https://www.garagetooladvisor.com/design/best-paint-garage-walls/

Thank you all!