As character names:

U+03F4 GREEK CAPITAL THETA SYMBOL character (ϴ)

As raw characters:

ϴ

As a string of HTML entities:

ϴ

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 180, hex 0xB4, octal \264, binary 10110100
This is continuation byte 1, expecting 0 more.

U+03F4	GREEK CAPITAL THETA SYMBOL
	x (cyrillic capital letter fita - 0472)
	# 0398 greek capital letter theta