Hello Sudharshan,

You have an average percentile, so you might not get a good college but I am providing a link below where you can find a list of colleges in Karnataka for B. Arch -

https://engineering.careers360.com/colleges/list-of-b-arch-colleges-in-karnataka

I would personally suggest you sit for the April session of the JEE Mains to get a better percentile score if you want a seat in a good college.

Good luck!