What is the term for numbers expressed using base 16?

Numbers expressed using base 16 are referred to as hexadecimal numbers. The hexadecimal system uses sixteen distinct symbols, which are the digits 0 through 9 and the letters A through F, representing the values 10 through 15. This numeral system is widely used in computing and digital electronics because it simplifies the representation of binary data. Each hexadecimal digit corresponds to a four-bit binary sequence, making it a compact way to express binary numbers.

For instance, the hexadecimal number '1A3' corresponds to the binary sequence '000110100011', illustrating how hexadecimal serves as a more readable format for binary information. Its use is prevalent in areas such as programming, memory addressing, and color coding in graphics, which highlights its practicality in technology.