With the new Bluesky butterfly logo it is possible to point to the Bluesky profile on your website without employing a graphics file icon since it is available as unicode character 🦋: https://www.compart.com/en/unicode/U+1F98B
Unicode
U+1F98B is the unicode hex value of the character Butterfly. Char U+1F98B, Encodings, HTML Entitys:🦋,🦋, UTF-8 (hex), UTF-16 (hex), UTF-32 (hex)https://www.compart.com/en/unicode/U+1F98B