This character is a Nonspacing Mark and inherits its script property from the preceding character. It is also used in the scripts Cherokee, Coptic, Cyrillic, Greek, Latin, Old Permic, Sunu, Tai Le. The character is also known as Greek varia.
The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+0300 prohibits a line break before it. The glyph can be confused with 2 other glyphs.
The Wikipedia has the following information about this codepoint:
The grave accent (◌̀) ( GRAYV or GRAHV) is a diacritical mark used to varying degrees in French, Dutch, Portuguese, Italian, Catalan and many other western European languages as well as for a few unusual uses in English. It is also used in other languages using the Latin alphabet, such as Mohawk and Yoruba, and with non-Latin writing systems such as the Greek and Cyrillic alphabets and the Bopomofo or Zhuyin Fuhao semi-syllabary. It has no single meaning, but can indicate pitch, stress, or other features.
For the most commonly encountered uses of the accent in the Latin and Greek alphabets, precomposed characters are available. For less-used and compound diacritics, a combining character facility is available. A free-standing version of the symbol (`), commonly called a backtick, also exists and has acquired other uses.
Representations
System
Representation (click value to copy)
Nº
768
UTF-8
CC 80
UTF-16
03 00
UTF-32
00 00 03 00
URL-Quoted
%CC%80
HTML hex reference
̀
Wrong windows-1252 Mojibake
◌̀
alias
Greek varia
Encoding: CP1258 (hex bytes)
CC
Encoding: EUC_JIS_2004 (hex bytes)
AB DC
Encoding: EUC_JISX0213 (hex bytes)
AB DC
Encoding: GB18030 (hex bytes)
81 30 BC 36
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 28 51 2B 5C 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 28 4F 2B 5C 1B 28 42
Encoding: SHIFT_JIS_2004 (hex bytes)
86 7B
Encoding: SHIFT_JISX0213 (hex bytes)
86 7B
LATEX
\`
AGL: Latin-4
gravecomb
AGL: Latin-5
gravecomb
Adobe Glyph List
gravecmb
Adobe Glyph List
gravecomb
RFC 5137
\u'0300'
Bash and Zsh inside echo -e
\u0300
C and C++
\u0300
C#
\u0300
CSS
\000300
Excel
=UNICHAR(768)
Go
\u0300
JavaScript
\u0300
Modern JavaScript since ES6
\u{300}
JSON
\u0300
Java
\u0300
Lua
\u{300}
Matlab
char(768)
Perl
"\x{300}"
PHP
\u{300}
PostgreSQL
U&'\0300'
PowerShell
`u{300}
Python
\u0300
Ruby
\u{300}
Rust
\u{300}
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