As character names:

U+25AF WHITE VERTICAL RECTANGLE character (▯)

As raw characters:

▯

As a string of HTML entities:

▯

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 150, hex 0x96, octal \226, binary 10010110
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 175, hex 0xAF, octal \257, binary 10101111
This is continuation byte 2, expecting 0 more.

U+25AF	WHITE VERTICAL RECTANGLE
	x (apl functional symbol squish quad - 2337)
	x (apl functional symbol quad - 2395)