Class | Color::RGB |
In: |
lib/color.rb
lib/color/rgb-colors.rb lib/color/rgb.rb |
Parent: | Object |
An RGB colour object.
AliceBlue | = | Color::RGB.new(0xf0, 0xf8, 0xff).freeze | ||
AntiqueWhite | = | Color::RGB.new(0xfa, 0xeb, 0xd7).freeze | ||
Aqua | = | Color::RGB.new(0x00, 0xff, 0xff).freeze | ||
Aquamarine | = | Color::RGB.new(0x7f, 0xff, 0xd4).freeze | ||
Azure | = | Color::RGB.new(0xf0, 0xff, 0xff).freeze | ||
Beige | = | Color::RGB.new(0xf5, 0xf5, 0xdc).freeze | ||
Bisque | = | Color::RGB.new(0xff, 0xe4, 0xc4).freeze | ||
Black | = | Color::RGB.new(0, 0, 0).freeze | ||
BlanchedAlmond | = | Color::RGB.new(0xff, 0xeb, 0xcd).freeze | ||
Blue | = | Color::RGB.new(0x00, 0x00, 0xff).freeze | ||
BlueViolet | = | Color::RGB.new(0x8a, 0x2b, 0xe2).freeze | ||
Brown | = | Color::RGB.new(0xa5, 0x2a, 0x2a).freeze | ||
Burlywood | = | Color::RGB.new(0xde, 0xb8, 0x87).freeze | ||
BurlyWood | = | Burlywood | ||
CadetBlue | = | Color::RGB.new(0x5f, 0x9e, 0xa0).freeze | ||
Chartreuse | = | Color::RGB.new(0x7f, 0xff, 0x00).freeze | ||
Chocolate | = | Color::RGB.new(0xd2, 0x69, 0x1e).freeze | ||
Coral | = | Color::RGB.new(0xff, 0x7f, 0x50).freeze | ||
CornflowerBlue | = | Color::RGB.new(0x64, 0x95, 0xed).freeze | ||
Cornsilk | = | Color::RGB.new(0xff, 0xf8, 0xdc).freeze | ||
Crimson | = | Color::RGB.new(0xdc, 0x14, 0x3c).freeze | ||
Cyan | = | Color::RGB.new(0x00, 0xff, 0xff).freeze | ||
DarkBlue | = | Color::RGB.new(0x00, 0x00, 0x8b).freeze | ||
DarkCyan | = | Color::RGB.new(0x00, 0x8b, 0x8b).freeze | ||
DarkGoldenrod | = | Color::RGB.new(0xb8, 0x86, 0x0b).freeze | ||
DarkGoldenRod | = | DarkGoldenrod | ||
DarkGray | = | Color::RGB.new(0xa9, 0xa9, 0xa9).freeze | ||
DarkGreen | = | Color::RGB.new(0x00, 0x64, 0x00).freeze | ||
DarkGrey | = | DarkGray | ||
DarkKhaki | = | Color::RGB.new(0xbd, 0xb7, 0x6b).freeze | ||
DarkMagenta | = | Color::RGB.new(0x8b, 0x00, 0x8b).freeze | ||
DarkoliveGreen | = | Color::RGB.new(0x55, 0x6b, 0x2f).freeze | ||
DarkOliveGreen | = | DarkoliveGreen | ||
Darkorange | = | Color::RGB.new(0xff, 0x8c, 0x00).freeze | ||
DarkOrange | = | Darkorange | ||
DarkOrchid | = | Color::RGB.new(0x99, 0x32, 0xcc).freeze | ||
DarkRed | = | Color::RGB.new(0x8b, 0x00, 0x00).freeze | ||
Darksalmon | = | Color::RGB.new(0xe9, 0x96, 0x7a).freeze | ||
DarkSalmon | = | Darksalmon | ||
DarkSeaGreen | = | Color::RGB.new(0x8f, 0xbc, 0x8f).freeze | ||
DarkSlateBlue | = | Color::RGB.new(0x48, 0x3d, 0x8b).freeze | ||
DarkSlateGray | = | Color::RGB.new(0x2f, 0x4f, 0x4f).freeze | ||
DarkSlateGrey | = | DarkSlateGray | ||
DarkTurquoise | = | Color::RGB.new(0x00, 0xce, 0xd1).freeze | ||
DarkViolet | = | Color::RGB.new(0x94, 0x00, 0xd3).freeze | ||
DeepPink | = | Color::RGB.new(0xff, 0x14, 0x93).freeze | ||
DeepSkyBlue | = | Color::RGB.new(0x00, 0xbf, 0xbf).freeze | ||
DimGray | = | Color::RGB.new(0x69, 0x69, 0x69).freeze | ||
DimGrey | = | DimGray | ||
DodgerBlue | = | Color::RGB.new(0x1e, 0x90, 0xff).freeze | ||
Feldspar | = | Color::RGB.new(0xd1, 0x92, 0x75).freeze | ||
Firebrick | = | Color::RGB.new(0xb2, 0x22, 0x22).freeze | ||
FireBrick | = | Firebrick | ||
FloralWhite | = | Color::RGB.new(0xff, 0xfa, 0xf0).freeze | ||
ForestGreen | = | Color::RGB.new(0x22, 0x8b, 0x22).freeze | ||
Fuchsia | = | Color::RGB.new(0xff, 0x00, 0xff).freeze | ||
Gainsboro | = | Color::RGB.new(0xdc, 0xdc, 0xdc).freeze | ||
GhostWhite | = | Color::RGB.new(0xf8, 0xf8, 0xff).freeze | ||
Gold | = | Color::RGB.new(0xff, 0xd7, 0x00).freeze | ||
Goldenrod | = | Color::RGB.new(0xda, 0xa5, 0x20).freeze | ||
GoldenRod | = | Goldenrod | ||
Gray | = | Color::RGB.new(0x80, 0x80, 0x80).freeze | ||
Green | = | Color::RGB.new(0x00, 0x80, 0x00).freeze | ||
GreenYellow | = | Color::RGB.new(0xad, 0xff, 0x2f).freeze | ||
Grey | = | Gray | ||
Honeydew | = | Color::RGB.new(0xf0, 0xff, 0xf0).freeze | ||
HoneyDew | = | Honeydew | ||
HotPink | = | Color::RGB.new(0xff, 0x69, 0xb4).freeze | ||
IndianRed | = | Color::RGB.new(0xcd, 0x5c, 0x5c).freeze | ||
Indigo | = | Color::RGB.new(0x4b, 0x00, 0x82).freeze | ||
Ivory | = | Color::RGB.new(0xff, 0xff, 0xf0).freeze | ||
Khaki | = | Color::RGB.new(0xf0, 0xe6, 0x8c).freeze | ||
Lavender | = | Color::RGB.new(0xe6, 0xe6, 0xfa).freeze | ||
LavenderBlush | = | Color::RGB.new(0xff, 0xf0, 0xf5).freeze | ||
LawnGreen | = | Color::RGB.new(0x7c, 0xfc, 0x00).freeze | ||
LemonChiffon | = | Color::RGB.new(0xff, 0xfa, 0xcd).freeze | ||
LightBlue | = | Color::RGB.new(0xad, 0xd8, 0xe6).freeze | ||
LightCoral | = | Color::RGB.new(0xf0, 0x80, 0x80).freeze | ||
LightCyan | = | Color::RGB.new(0xe0, 0xff, 0xff).freeze | ||
LightGoldenrodYellow | = | Color::RGB.new(0xfa, 0xfa, 0xd2).freeze | ||
LightGoldenRodYellow | = | LightGoldenrodYellow | ||
LightGray | = | Color::RGB.new(0xd3, 0xd3, 0xd3).freeze | ||
LightGreen | = | Color::RGB.new(0x90, 0xee, 0x90).freeze | ||
LightGrey | = | LightGray | ||
LightPink | = | Color::RGB.new(0xff, 0xb6, 0xc1).freeze | ||
Lightsalmon | = | Color::RGB.new(0xff, 0xa0, 0x7a).freeze | ||
LightSalmon | = | Lightsalmon | ||
LightSeaGreen | = | Color::RGB.new(0x20, 0xb2, 0xaa).freeze | ||
LightSkyBlue | = | Color::RGB.new(0x87, 0xce, 0xfa).freeze | ||
LightSlateBlue | = | Color::RGB.new(0x84, 0x70, 0xff).freeze | ||
LightSlateGray | = | Color::RGB.new(0x77, 0x88, 0x99).freeze | ||
LightSlateGrey | = | LightSlateGray | ||
LightsteelBlue | = | Color::RGB.new(0xb0, 0xc4, 0xde).freeze | ||
LightSteelBlue | = | LightsteelBlue | ||
LightYellow | = | Color::RGB.new(0xff, 0xff, 0xe0).freeze | ||
Lime | = | Color::RGB.new(0x00, 0xff, 0x00).freeze | ||
LimeGreen | = | Color::RGB.new(0x32, 0xcd, 0x32).freeze | ||
Linen | = | Color::RGB.new(0xfa, 0xf0, 0xe6).freeze | ||
Magenta | = | Color::RGB.new(0xff, 0x00, 0xff).freeze | ||
Maroon | = | Color::RGB.new(0x80, 0x00, 0x00).freeze | ||
MediumAquamarine | = | Color::RGB.new(0x66, 0xcd, 0xaa).freeze | ||
MediumAquaMarine | = | MediumAquamarine | ||
MediumBlue | = | Color::RGB.new(0x00, 0x00, 0xcd).freeze | ||
MediumOrchid | = | Color::RGB.new(0xba, 0x55, 0xd3).freeze | ||
MediumPurple | = | Color::RGB.new(0x93, 0x70, 0xdb).freeze | ||
MediumSeaGreen | = | Color::RGB.new(0x3c, 0xb3, 0x71).freeze | ||
MediumSlateBlue | = | Color::RGB.new(0x7b, 0x68, 0xee).freeze | ||
MediumSpringGreen | = | Color::RGB.new(0x00, 0xfa, 0x9a).freeze | ||
MediumTurquoise | = | Color::RGB.new(0x48, 0xd1, 0xcc).freeze | ||
MediumVioletRed | = | Color::RGB.new(0xc7, 0x15, 0x85).freeze | ||
MidnightBlue | = | Color::RGB.new(0x19, 0x19, 0x70).freeze | ||
MintCream | = | Color::RGB.new(0xf5, 0xff, 0xfa).freeze | ||
MistyRose | = | Color::RGB.new(0xff, 0xe4, 0xe1).freeze | ||
Moccasin | = | Color::RGB.new(0xff, 0xe4, 0xb5).freeze | ||
NavajoWhite | = | Color::RGB.new(0xff, 0xde, 0xad).freeze | ||
Navy | = | Color::RGB.new(0x00, 0x00, 0x80).freeze | ||
OldLace | = | Color::RGB.new(0xfd, 0xf5, 0xe6).freeze | ||
Olive | = | Color::RGB.new(0x80, 0x80, 0x00).freeze | ||
Olivedrab | = | Color::RGB.new(0x6b, 0x8e, 0x23).freeze | ||
OliveDrab | = | Olivedrab | ||
Orange | = | Color::RGB.new(0xff, 0xa5, 0x00).freeze | ||
OrangeRed | = | Color::RGB.new(0xff, 0x45, 0x00).freeze | ||
Orchid | = | Color::RGB.new(0xda, 0x70, 0xd6).freeze | ||
PaleGoldenrod | = | Color::RGB.new(0xee, 0xe8, 0xaa).freeze | ||
PaleGoldenRod | = | PaleGoldenrod | ||
PaleGreen | = | Color::RGB.new(0x98, 0xfb, 0x98).freeze | ||
PaleTurquoise | = | Color::RGB.new(0xaf, 0xee, 0xee).freeze | ||
PaleVioletRed | = | Color::RGB.new(0xdb, 0x70, 0x93).freeze | ||
PapayaWhip | = | Color::RGB.new(0xff, 0xef, 0xd5).freeze | ||
Peachpuff | = | Color::RGB.new(0xff, 0xda, 0xb9).freeze | ||
PeachPuff | = | Peachpuff | ||
Peru | = | Color::RGB.new(0xcd, 0x85, 0x3f).freeze | ||
Pink | = | Color::RGB.new(0xff, 0xc0, 0xcb).freeze | ||
Plum | = | Color::RGB.new(0xdd, 0xa0, 0xdd).freeze | ||
PowderBlue | = | Color::RGB.new(0xb0, 0xe0, 0xe6).freeze | ||
Purple | = | Color::RGB.new(0x80, 0x00, 0x80).freeze | ||
Red | = | Color::RGB.new(0xff, 0x00, 0x00).freeze | ||
RosyBrown | = | Color::RGB.new(0xbc, 0x8f, 0x8f).freeze | ||
RoyalBlue | = | Color::RGB.new(0x41, 0x69, 0xe1).freeze | ||
SaddleBrown | = | Color::RGB.new(0x8b, 0x45, 0x13).freeze | ||
Salmon | = | Color::RGB.new(0xfa, 0x80, 0x72).freeze | ||
SandyBrown | = | Color::RGB.new(0xf4, 0xa4, 0x60).freeze | ||
SeaGreen | = | Color::RGB.new(0x2e, 0x8b, 0x57).freeze | ||
Seashell | = | Color::RGB.new(0xff, 0xf5, 0xee).freeze | ||
SeaShell | = | Seashell | ||
Sienna | = | Color::RGB.new(0xa0, 0x52, 0x2d).freeze | ||
Silver | = | Color::RGB.new(0xc0, 0xc0, 0xc0).freeze | ||
SkyBlue | = | Color::RGB.new(0x87, 0xce, 0xeb).freeze | ||
SlateBlue | = | Color::RGB.new(0x6a, 0x5a, 0xcd).freeze | ||
SlateGray | = | Color::RGB.new(0x70, 0x80, 0x90).freeze | ||
SlateGrey | = | SlateGray | ||
Snow | = | Color::RGB.new(0xff, 0xfa, 0xfa).freeze | ||
SpringGreen | = | Color::RGB.new(0x00, 0xff, 0x7f).freeze | ||
SteelBlue | = | Color::RGB.new(0x46, 0x82, 0xb4).freeze | ||
Tan | = | Color::RGB.new(0xd2, 0xb4, 0x8c).freeze | ||
Teal | = | Color::RGB.new(0x00, 0x80, 0x80).freeze | ||
Thistle | = | Color::RGB.new(0xd8, 0xbf, 0xd8).freeze | ||
Tomato | = | Color::RGB.new(0xff, 0x63, 0x47).freeze | ||
Turquoise | = | Color::RGB.new(0x40, 0xe0, 0xd0).freeze | ||
Violet | = | Color::RGB.new(0xee, 0x82, 0xee).freeze | ||
VioletRed | = | Color::RGB.new(0xd0, 0x20, 0x90).freeze | ||
Wheat | = | Color::RGB.new(0xf5, 0xde, 0xb3).freeze | ||
White | = | Color::RGB.new(0xff, 0xff, 0xff).freeze | ||
WhiteSmoke | = | Color::RGB.new(0xf5, 0xf5, 0xf5).freeze | ||
Yellow | = | Color::RGB.new(0xff, 0xff, 0x00).freeze | ||
YellowGreen | = | Color::RGB.new(0x9a, 0xcd, 0x32).freeze | ||
Gray10 | = | Grey10 = Color::RGB.from_percentage(10, 10, 10).freeze | ||
Gray20 | = | Grey20 = Color::RGB.from_percentage(20, 20, 20).freeze | ||
Gray30 | = | Grey30 = Color::RGB.from_percentage(30, 30, 30).freeze | ||
Gray40 | = | Grey40 = Color::RGB.from_percentage(40, 40, 40).freeze | ||
Gray50 | = | Grey50 = Color::RGB.from_percentage(50, 50, 50).freeze | ||
Gray60 | = | Grey60 = Color::RGB.from_percentage(60, 60, 60).freeze | ||
Gray70 | = | Grey70 = Color::RGB.from_percentage(70, 70, 70).freeze | ||
Gray80 | = | Grey80 = Color::RGB.from_percentage(80, 80, 80).freeze | ||
Gray90 | = | Grey90 = Color::RGB.from_percentage(90, 90, 90).freeze | ||
PDF_FORMAT_STR | = | "%.3f %.3f %.3f %s" | The format of a DeviceRGB colour for PDF. In color-tools 2.0 this will be removed from this package and added back as a modification by the PDF::Writer package. |
b | [RW] | |
g | [RW] | |
r | [RW] |
Creates an RGB colour object from fractional values 0..1.
Color::RGB.from_fraction(.3, .2, .1)
Creates an RGB colour object from an HTML colour descriptor (e.g., "fed" or "cabbed;".
Color::RGB.from_html("fed") Color::RGB.from_html("#fed") Color::RGB.from_html("#cabbed") Color::RGB.from_html("cabbed")
Creates an RGB colour object from percentages 0..100.
Color::RGB.from_percentage(10, 20 30)
Creates an RGB colour object from the standard range 0..255.
Color::RGB.new(32, 64, 128) Color::RGB.new(0x20, 0x40, 0x80)
Compares the other colour to this one. The other colour will be converted to RGB before comparison, so the comparison between a RGB colour and a non-RGB colour will be approximate and based on the other colour‘s default to_rgb conversion. If there is no to_rgb conversion, this will raise an exception. This will report that two RGB colours are equivalent if all component values are within 1e-4 (0.0001) of each other.
Returns a new colour with the brightness adjusted by the specified percentage. Negative percentages will darken the colour; positive percentages will brighten the colour.
Color::RGB::DarkBlue.adjust_brightness(10) Color::RGB::DarkBlue.adjust_brightness(-10)
Returns a new colour with the hue adjusted by the specified percentage. Negative percentages will reduce the hue; positive percentages will increase the hue.
Color::RGB::DarkBlue.adjust_hue(10) Color::RGB::DarkBlue.adjust_hue(-10)
Returns a new colour with the saturation adjusted by the specified percentage. Negative percentages will reduce the saturation; positive percentages will increase the saturation.
Color::RGB::DarkBlue.adjust_saturation(10) Color::RGB::DarkBlue.adjust_saturation(-10)
Returns the brightness value for a colour, a number between 0..1. Based on the Y value of YIQ encoding, representing luminosity, or perceived brightness.
This may be modified in a future version of color-tools to use the luminosity value of HSL.
Mix the mask colour (which must be an RGB object) with the current colour at the stated opacity percentage (0..100).
Present the colour as a DeviceRGB fill colour string for PDF. This will be removed from the default package in color-tools 2.0.
Present the colour as a DeviceRGB stroke colour string for PDF. This will be removed from the default package in color-tools 2.0.
Converts the RGB colour to CMYK. Most colour experts strongly suggest that this is not a good idea (some even suggesting that it‘s a very bad idea). CMYK represents additive percentages of inks on white paper, whereas RGB represents mixed colour intensities on a black screen.
However, the colour conversion can be done. The basic method is multi-step:
c = 1.0 – r m = 1.0 – g y = 1.0 – b
k = min(c, m, y)
c = min(1.0, max(0.0, c – UCR(k))) m = min(1.0, max(0.0, m – UCR(k))) y = min(1.0, max(0.0, y – UCR(k))) k = min(1.0, max(0.0, BG(k)))
The undercolour removal function and the black generation functions return a value based on the brightness of the RGB colour.