As character names:

U+25CF BLACK CIRCLE 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 151, hex 0x97, octal \227, binary 10010111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 143, hex 0x8F, octal \217, binary 10001111
This is continuation byte 2, expecting 0 more.

U+25CF	BLACK CIRCLE
	x (black large circle - 2B24)
	x (new moon symbol - 1F311)
	x (large red circle - 1F534)