As character names:

U+03C3 GREEK SMALL LETTER SIGMA character (σ)

As raw characters:

σ

As a string of HTML entities:

σ

Decoder output:

Byte number 1 is decimal 207, hex 0xCF, octal \317, binary 11001111
This is the first byte of a 2 byte sequence.

Byte number 2 is decimal 131, hex 0x83, octal \203, binary 10000011
This is continuation byte 1, expecting 0 more.

U+03C3	GREEK SMALL LETTER SIGMA
	* used symbolically with a numeric value 200