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1A2B3C

1a2b3c is a six-character alphanumeric sequence that frequently appears in computing as a placeholder value or example. The characters are hexadecimal digits, comprising the numerals 0 through 9 and the letters a through f. When formatted as a color code with a leading hash, it is written as #1a2b3c.

As a hex color, #1a2b3c corresponds to RGB values of 26, 43, and 60. This produces a

In programming and education, 1a2b3c is used in tutorials to illustrate string parsing, input validation with

The sequence is not a standard abbreviation for any widely recognized term; rather, it is a convenient,

See also: Hexadecimal notation, Web color, and Regular expressions.

dark
blue-gray
hue
commonly
used
in
design
palettes
and
user
interfaces.
regular
expressions,
and
the
handling
of
hex-color
values.
It
also
serves
as
a
compact
example
in
data
generation
and
testing.
human-readable
combination
of
digits
and
letters
that
adheres
to
hex
notation.
Other
six-character
hex
strings
are
often
used
in
similar
contexts,
such
as
0a1b2c
or
abc123.