Code point
U+2BC3
Glyph appearance depends on your fonts.
U+2BC3
SoU+2BC3 HORIZONTAL BLACK OCTAGON is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Miscellaneous Symbols and Arrows block.
Choose the representation you need, then copy its value.
U+2BC3
11203
⯃
⯃
E2 AF 83
2BC3
00002BC3
%E2%AF%83
\u2BC3
\u2BC3
\u2BC3
\2BC3