Code point
U+25BF
Glyph appearance depends on your fonts.
U+25BF
SoU+25BF WHITE DOWN-POINTING SMALL TRIANGLE is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25BF
9663
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E2 96 BF
25BF
000025BF
%E2%96%BF
\u25BF
\u25BF
\u25BF
\25BF