In hexadecimal if u borrow one does it mean u borrowed 16?

✅ Correct!

In hexadecimal (base 16), when you borrow 1 from the digit in the column to its left, it means you are adding $16_{10}$ (which is $10_{16}$) to the value of the digit in the current column.

This is similar to how in decimal (base 10) subtraction, when you borrow 1 from the tens place, you are adding $10_{10}$ to the ones place. The value you borrow is always equal to the base of the number system.