Here are some types of color which we are used in color processing.We are discussing them one by one:-
Additive Colors or Primary colors:-Red,Green & Blue colors are called additive colors Because they makes a RGB model which is produce by adding these three colors in various ways & gives broad array of colors.These three colors are superimposed together to form the mixture .Each color has a intensity value from 0 to highest specified value they can be vary between these two value .If we mix together all the three colors with their minimum value then the output color is dark means black & If we mix these colors with their highest values then we get a brightest color which is white.Additive colors are device dependent their combination may vary from one device to another.Typical input devices in which we use additive color model are Video cameras ,digital cameras & scanners while output devices are LCDs,LEDs ,plasma Tvs,computer & mobile phone displays & video projectors.They are also called primary colors because our eyes highest sensible for these three colors .Almost all colors which we can see through our eyes are combination of only these three colors.
Subtractive Colors or Secondary Colors:- Cyan,Magenta & Yellow colors are called subtractive colors.These colors can be produce by adding two of three primary colors in equals proportions .Cyan color is produce by adding Green & Blue ,Subtractive colors are widely used in color printing,inkjet printing &
photographic color processes.Magenta color is produce by adding red & blue in equal proportion,while yellow color is produce through mixing green & red colors in equal proportions.Thus we can say that cyan is complement of red that means cyan serves as a filter that absorbs red ,Magenta is complement of green that means magenta serves as a filter that absorbs green & yellow is complement of blue that means yellow serves as a filter that absorbs blue.The amount of cyan applied to a white sheet controls how much red from white light reflected back from the paper.The cyan color is completely transparent to blue & green light & it has no effect on those part of spectrum.This theory is also applied to the magenta & yellow for their corresponding colors.These colors are also called secondary colors because they are produced by the primary colors to create a wider range of colors.
Tertiary Color:-Tertiary color is a color which is made by mixing either one primary color with one secondary color or two secondary colors in a given color space like RGB which is a modern color space
or RYB which is a traditional color space.Tertiary colors have the specific set of names one for RGB & one for RYB.Here are some tertiary color in RGB color space & made by mixing one primary & secondary color.
cyan(●)+blue(●)=azure(●)
blue(●)+magenta(●)=violet(●)
magenta(●)+red(●)=rose(●)
red(●)+yellow(●)=orange(●)
yellow(●)+green(●)=chartreuse(●)
green(●)+cyan(●)=spring green(●)
In RYB color space primary colors are Red ,Yellow & Blue .The secondary colors which are orange ,green & violet they are made by combining primary colors.Tertiary color are named by combining their name.
red(●)+orange(●)=vermilion (red-orange)(●)
orange(●)+yellow(●)=amber (yellow-orange)(●)
yellow(●)+green(●)=chartreuse (yellow-green)(●)
green(●)+blue(●)=viridian (blue-green)(●)
blue(●)+purple(●)=violet (blue-purple)(●)
purple(●)+red(●)=magenta (red-purple)(●)
Neutral Color:- There are only three neutral colors Black,White & Grey .Basically a neutral color is a monochromatic color.Black color made due to mixture of smallest intensities of Red ,green & blue channels.White color made due to mixture of highest intensity value of Red ,Green & Blue Channels.Grey color is a intermediate between black & white which is achromatic color .It has the all red,green & blue channels value equal in a pixel.This color has wide use in image processing.
Complementary Colors:-Two colors are called complementary if they exactly opposite in a specific color model .Like red & cyan,green & magenta,yellow & blue are complementary to each other in RGB color model .If they are mixed in proper proportion they resulted a neutral color means black,white or grey.Purple & green,orange & blue ,yellow & violet are complementary in RYB color model.
Analogous Colors:-Analogous colors are group of colors which are adjacent to each other in color wheel.One of them will be a dominant color & must be a primary or secondary color & other colors will be tertiary.But this scheme has contrast & is less vibrant than complementary colors.Example of analogous colors are given below:-
1)red,red-orange,red-violet
2)blue,blue-violet,blue-green
3)yellow,yellow-orange,yellow-green
4)green,yellow-green,blue-green
5)violet,blue-violet,red-violet
6)orange,red-orange,yellow-orange.
Additive Colors or Primary colors:-Red,Green & Blue colors are called additive colors Because they makes a RGB model which is produce by adding these three colors in various ways & gives broad array of colors.These three colors are superimposed together to form the mixture .Each color has a intensity value from 0 to highest specified value they can be vary between these two value .If we mix together all the three colors with their minimum value then the output color is dark means black & If we mix these colors with their highest values then we get a brightest color which is white.Additive colors are device dependent their combination may vary from one device to another.Typical input devices in which we use additive color model are Video cameras ,digital cameras & scanners while output devices are LCDs,LEDs ,plasma Tvs,computer & mobile phone displays & video projectors.They are also called primary colors because our eyes highest sensible for these three colors .Almost all colors which we can see through our eyes are combination of only these three colors.
Subtractive Colors or Secondary Colors:- Cyan,Magenta & Yellow colors are called subtractive colors.These colors can be produce by adding two of three primary colors in equals proportions .Cyan color is produce by adding Green & Blue ,Subtractive colors are widely used in color printing,inkjet printing &
photographic color processes.Magenta color is produce by adding red & blue in equal proportion,while yellow color is produce through mixing green & red colors in equal proportions.Thus we can say that cyan is complement of red that means cyan serves as a filter that absorbs red ,Magenta is complement of green that means magenta serves as a filter that absorbs green & yellow is complement of blue that means yellow serves as a filter that absorbs blue.The amount of cyan applied to a white sheet controls how much red from white light reflected back from the paper.The cyan color is completely transparent to blue & green light & it has no effect on those part of spectrum.This theory is also applied to the magenta & yellow for their corresponding colors.These colors are also called secondary colors because they are produced by the primary colors to create a wider range of colors.
Tertiary Color:-Tertiary color is a color which is made by mixing either one primary color with one secondary color or two secondary colors in a given color space like RGB which is a modern color space
or RYB which is a traditional color space.Tertiary colors have the specific set of names one for RGB & one for RYB.Here are some tertiary color in RGB color space & made by mixing one primary & secondary color.
cyan(●)+blue(●)=azure(●)
blue(●)+magenta(●)=violet(●)
magenta(●)+red(●)=rose(●)
red(●)+yellow(●)=orange(●)
yellow(●)+green(●)=chartreuse(●)
green(●)+cyan(●)=spring green(●)
In RYB color space primary colors are Red ,Yellow & Blue .The secondary colors which are orange ,green & violet they are made by combining primary colors.Tertiary color are named by combining their name.
red(●)+orange(●)=vermilion (red-orange)(●)
orange(●)+yellow(●)=amber (yellow-orange)(●)
yellow(●)+green(●)=chartreuse (yellow-green)(●)
green(●)+blue(●)=viridian (blue-green)(●)
blue(●)+purple(●)=violet (blue-purple)(●)
purple(●)+red(●)=magenta (red-purple)(●)
Neutral Color:- There are only three neutral colors Black,White & Grey .Basically a neutral color is a monochromatic color.Black color made due to mixture of smallest intensities of Red ,green & blue channels.White color made due to mixture of highest intensity value of Red ,Green & Blue Channels.Grey color is a intermediate between black & white which is achromatic color .It has the all red,green & blue channels value equal in a pixel.This color has wide use in image processing.
Complementary Colors:-Two colors are called complementary if they exactly opposite in a specific color model .Like red & cyan,green & magenta,yellow & blue are complementary to each other in RGB color model .If they are mixed in proper proportion they resulted a neutral color means black,white or grey.Purple & green,orange & blue ,yellow & violet are complementary in RYB color model.
Analogous Colors:-Analogous colors are group of colors which are adjacent to each other in color wheel.One of them will be a dominant color & must be a primary or secondary color & other colors will be tertiary.But this scheme has contrast & is less vibrant than complementary colors.Example of analogous colors are given below:-
1)red,red-orange,red-violet
2)blue,blue-violet,blue-green
3)yellow,yellow-orange,yellow-green
4)green,yellow-green,blue-green
5)violet,blue-violet,red-violet
6)orange,red-orange,yellow-orange.
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