Currently, SBI Logo is a blue circle with a small cut at the bottom. This logo was designed by Shekhar Kamat, alumni of National Institute of Design, Ahmedabad.
The Blue Circle represent Unity and Completeness and the White Color represent Common Man as an important part of the huge size bank.
If you look at the SBI Logo properly then you will a big locker with a Keyhole in between. So, it denotes your bank locker.
State Bank of India
It is also said the inspiration for this design came from the Ahmedabad city’s Kankaria Lake. This is how Kankaria Lake look like from the top
kankaria lake top view Source: Twitter