# 0075: Incorrect hexadecimal value

There is a symbol in the [`HEX..END`](https://docs.sannybuilder.com/language/instructions/hex..end) statement that is not a hexadecimal numeral. Valid hexadecimal numerals are digits `0` through `9` and letters `A` through `F`. [String literals](https://docs.sannybuilder.com/language/data-types#string-literals) must be enclosed in double quotes.

**Possible solutions:** change the mentioned value:

```
hex
  Hi  // error, Hi is not hexadecimal
end

hex
  "Hi" // OK
end
```