Hi @michaelhatgis,
Thank you for your question and welcome to the Bunnings Workshop community, it is fantastic to have you with us.
Unfortunately, I am unaware of a paint in-store that would be suitable for mudbricks.
I've received advice from Dulux that there is a range of Traditional Lime Wash Exterior Paints from Porter's Paints that you could speak to the Special Orders desk about potentially ordering.
If you are looking to use traditional construction techniques, you could use hydrated lime to produce lime wash, but your only option in terms of colour would be white.
You can check out this project from @Herrenovacation for an example of a project using limewash - Limewash brick house.
Let me know if you have any further questions.
Jacob
