Code point
U+2751
Glyph appearance depends on your fonts.
U+2751
SoU+2751 LOWER RIGHT SHADOWED WHITE SQUARE is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Dingbats block.
Choose the representation you need, then copy its value.
U+2751
10065
❑
❑
E2 9D 91
2751
00002751
%E2%9D%91
\u2751
\u2751
\u2751
\2751