Free hair colors software for linux

Alegre colors 1.0 is yet another excellent addition for Gnome users. It is actually a specific theme for ubuntu desktop.

Imager::Color is a Perl module with color handling for Imager.

SYNOPSIS

$color = Imager::Color->new($red, $green, $blue);
$color = Imager::Color->new($red, $green, $blue, $alpha);
$color = Imager::Color->new("#C0C0FF"); # html color specification

$color->set($red, $green, $blue);
$color->set($red, $green, $blue, $alpha);
$color->set("#C0C0FF"); # html color specification

($red, $green, $blue, $alpha) = $color->rgba();
@hsv = $color->hsv(); # not implemented but proposed

$color->info();

if ($color->equals(other=>$other_color)) {
...
}

This module handles creating color objects used by imager. The idea is that in the future this module will be able to handle colorspace calculations as well.

new

This creates a color object to pass to functions that need a color argument.

set

This changes an already defined color. Note that this does not affect any places where the color has been used previously.

rgba

This returns the rgba code of the color the object contains.

info

Calling info merely dumps the relevant colorcode to the log.

equals(other=>$other_color)
equals(other=>$other_color, ignore_alpha=>1)

Compares $self and color $other_color returning true if the color components are the same.

Compares all four channels unless ignore_alpha is set. If ignore_alpha is set only the first three channels are compared.

You can specify colors in several different ways, you can just supply simple values:
simple numeric parameters - if you supply 3 or 4 numeric arguments, you get a color made up of those RGB (and possibly A) components.

a six hex digit web color, either RRGGBB or #RRGGBB
an eight hex digit web color, either RRGGBBAA or #RRGGBBAA.
a 3 hex digit web color, #RGB - a value of F becomes 255.
a color name, from whichever of the gimp Named_Colors file or X rgb.txt is found first. The same as using the name keyword.

You can supply named parameters:

red, green and blue, optionally shortened to r, g and b. The color components in the range 0 to 255.

# all of the following are equivalent
my $c1 = Imager::Color->new(red=>100, blue=>255, green=>0);
my $c2 = Imager::Color->new(r=>100, b=>255, g=>0);
my $c3 = Imager::Color->new(r=>100, blue=>255, g=>0);
hue, saturation and value, optionally shortened to h, s and v, to specify a HSV color. 0 new(hue=>120, value=>1, saturation=>0.5);
web, which can specify a 6 or 3 hex digit web color, in any of the forms #RRGGBB, #RGB, RRGGBB or RGB.
my $c1 = Imager::Color->new(web=>#FFC0C0); # pale red
gray or grey which specifies a single channel, from 0 to 255.
# exactly the same
my $c1 = Imager::Color->new(gray=>128);
my $c1 = Imager::Color->new(grey=>128);
rgb which takes a 3 member arrayref, containing each of the red, green and blue values.
# the same
my $c1 = Imager::Color->new(rgb=>[255, 100, 0]);
my $c1 = Imager::Color->new(r=>255, g=>100, b=>0);
hsv which takes a 3 member arrayref, containting each of hue, saturation and value.
# the same
my $c1 = Imager::Color->new(hsv=>[120, 0.5, 1]);
my $c1 = Imager::Color->new(hue=>120, v=>1, s=>0.5);

gimp which specifies a color from a GIMP palette file. You can specify the filename of the palette file with the palette parameter, or let Imager::Color look in various places, typically "$HOME/gimp-1.x/palettes/Named_Colors" with and without the version number, and in /usr/share/gimp/palettes/. The palette file must have color names.

my $c1 = Imager::Color->new(gimp=>snow);
my $c1 = Imager::Color->new(gimp=>snow, palette=>testimg/test_gimp_pal);

xname which specifies a color from an X11 rgb.txt file. You can specify the filename of the rgb.txt file with the palette parameter, or let Imager::Color look in various places, typically /usr/lib/X11/rgb.txt.

my $c1 = Imager::Color->new(xname=>blue) # usually RGB(0, 0, 255)

builtin which specifies a color from the built-in color table in Imager::Color::Table. The colors in this module are the same as the default X11 rgb.txt file.

my $c1 = Imager::Color->new(builtin=>black) # always RGB(0, 0, 0)

name which specifies a name from either a GIMP palette, an X rgb.txt file or the built-in color table, whichever is found first.

channel0, channel1, etc, each of which specifies a single channel. These can be abbreviated to c0, c1 etc.

channels which takes an arrayref of the channel values.

Optionally you can add an alpha channel to a color with the alpha or a parameter.

These color specifications can be used for both constructing new colors with the new() method and modifying existing colors with the set() method.

colorname is both a plugin for The Gimp as well as a standalone tool that tries to assign a name to a color, using external color definitions and linear algebra.

For this it calculates the euclidean distance between the currently selected color and all predefined colors, either in the RGB or HSV color space.

This project is licensed under the GPLv3.

Usage:

Standalone

Just start colorname.py

Gimp plugin

Once installed you can find colorname in the GIMP under: ”< Toolbox >/Xtns/Colorname”

Argyll is an experimental ICC-compatible color management system. Argyll Color Management System supports accurate ICC profile creation for scanners, CMYK printers, film recorders, and display monitors.
Spectral sample data is supported, allowing a selection of illuminants observer types, and paper fluorescent whitener additive compensation. Profiles can also incorporate source-specific gamut mappings for perceptual and saturation intents.
Gamut mapping and profile linking uses the CIECAM02 appearance model, a unique gamut mapping algorithm, and a wide selection of rendering intents.
It also includes code for a fast, portable 8-bit raster color conversion engine, as well as support for fast, fully accurate 16-bit conversion. Device color gamuts can also be viewed and compared using a VRML viewer.
Enhancements:
- Support for the USB-based X-Rite DTP94 (AKA Optix) display colorimeter.
- Comprehensive display control adjustment and calibration support.
- Full multi-monitor support for display adjustment, calibration, and profiling on all supported operating systems (MS Windows, OS X, and Linux/X11). Numerous bugfixes, and many minor feature additions and improvements.

Color::Fade provides a Perl extension for fading text colors.

Color::Fade uses mathematical formulas to take an input string of virtually any length, and virtually any number of colors, and assign an individual color to each character to fade between each of the input colors.

In other words, it makes your sentences look really pretty.

Methods

Fade $string among the colors in @colors, where $string is a string of length greater than zero, and @colors is an array of colors in six byte hexadecimal format, with or without the leading octothorpe. @colors must have at least two elements.

When called in array context, the method returns an array in which each element is of the format:

y

For each character, where xxxxxx is a hexadecimal color code and y is one character from the original string.

When called in scalar context, this array is joined before being returned.

SDL::Color is a SDL perl extension.

SYNOPSIS

$color = new SDL::Color ( -r => 0xde, -g => 0xad, -b =>c0 );
$color = new SDL::Color -surface => $app, -pixel => $app->pixel($x,$y);
$color = new SDL::Color -color => SDL::NewColor(0xff,0xaa,0xdd);

SDL::Color is a wrapper for display format independent color representations, with the same interface as SDL::Color.

new ( -color => )

SDL::Color::new with a -color option will construct a new object referencing the passed SDL_Color*.

new (-r => , -g => , -b => )

SDL::Color::new with -r,-g,-b options will construct both a SDL_Color structure, and the associated object with the specified vales.

new (-pixel =>, -surface =>)

SDL::Color::new with -pixel,-surface options will generate a SDL_Color* with the r,g,b values associated with the integer value passed by -pixel for the given -surfaces format.

r ( [ red ] ), g( [ green ] ), b( [ blue ] )

SDL::Color::r, SDL::Color::g, SDL::Color::b are accessor methods for the red, green, and blue components respectively. The color value can be set by passing a byte value (0-255) to each function.

pixel ( surface )

SDL::Color::pixel takes a SDL::Surface object and r,g,b values, and returns the integer representation of the closest color for the given surface.