Online converters cannot be trusted AT ALL. NEVER use them
Hex numbers are just RGB values in letter hex form, so your 00B2A9 = 0R 178G 169B.
This is a teal colour, certainly.
What you got for CMYK values from your online source are waaay off as you barely have any yellow in it and a hella amount of black. Not at all in the ballpark.
If you are looking for a CMYK value for something you are producing in Print, make sure you have appropriate Color Settings (ICC profiles) for your print situation in your Adobe apps, and use them to convert. EVERY different combination of these will produce different results required for that situation – There are no standard conversion values.