About the #character "Χ":
- Codepoint: U+03A7
- Name: Greek Capital Letter Chi
- Block: Greek and Coptic
- Version: 1.1
- HTML: &#03A7;
- CSS: \0003A7
- JS: \u03A7

More info: https://unicodeplus.com/U+03A7

"Χ" U+03A7: Greek Capital Letter Chi (Unicode Character)

The unicode character U+03A7 (Χ) is named "Greek Capital Letter Chi" and belongs to the Greek and Coptic block. It is HTML encoded as Χ.