[Glossary](https://useratio.app/glossary) › Developer terms

# Hexadecimal

Counting in base 16, with the digits 0 to 9 and A to F.

One hex digit stands for four bits, so two digits make a byte. That is why colours, memory addresses and hashes are written in hex. 255 is FF.

## In Ratio

| You type | Ratio shows |
| --- | --- |
| `255 in hex` | 0xFF |

## Related

[Binary](https://useratio.app/glossary/binary) · [Fixed-width integers](https://useratio.app/glossary/fixed-width-integer) · [All terms](https://useratio.app/glossary)

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Source: https://useratio.app/glossary/hexadecimal