When I want to vocalize a hexadecimal number like 0x41, so I say "forty one in hexadecimal", "four, one in hex" or what? Or do you always have to calculate and say "65 in hexadecimal notation"? I feel like that would complicate communication if I just want to tell someone what numbers I see on the paper in fornt of me, so he can write them down for example.
The best way is to read out the digits and then say "hex(adecimal)". Don't say "forty-one hex" because "forty" means four times ten, whereas the four in 41h stands for four times sixteen. Don't say "sixty-five in hex" because then the person you're talking to doesn't know if you mean "The decimal number sixty-five, only written out in hex, i.e., four-one-hex" or "The number six-five-hex, i.e., one hundred and five decimal."