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In short: CMYK is subtractive color mostly used in print, while RGB is additive color mostly used in display graphics.
The name of the CMYK color model stands for Cyan (a pale blue) Magenta (a hot pink), Yellow, and Key (or black).
The name of the RGB color model stands for Red, Green, and Blue.
CMYK, or 'four color printing', is what is called a 'subtractive' color model, because it starts with white - such as paper - which is the combination of all colors, and filters of subtracts out those colors not wanted by the application of colored dyes or inks.
Putting, for instance, a cyan lens in front of a white light, or cyan ink on a sheet of white paper, will prevent other wavelengths of light from passing through the lens or reflecting back from the paper. Using combinations of these ink colors in varying amounts will produce the various colors needed for a picture or graphic. Equal amounts of yellow and cyan, for instance, produce a standard, medium green.
Key black is added to the four color printing process because the combination of cyan, magenta, and yellow in practice produce a 'black' that looks more like a dark muddy brown.
RGB is called an 'additive' color model because it starts with the absence of light or color - black - as one would find in a television screen or computer monitor with no power, and adds light in colors as needed.
As with CMYK (and other color models) the combination of these colors in varying amounts creates the secondary and tertiary colors desired for more complex images.
See the links below for more exhaustive information on RGB and CMYK color models.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoIn its most basic form, RGB (red, green, blue) is additive and CMYK (cyan, magenta, yellow, key/black) is subtractive. Additive color modes are used for things like TV, computer screens, lighting, and things where the combination of all colors is white. Subtractive is for printing where the combination of all colors is black.
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Why RGB colour model is used for display and CMY model for hardcopy?
The RGB color model creates colors by mixing light, red, green and blue. All video displays are RGB. Since it is impossible to print a light mixture printers are able to simulate full color by using four colors, cyan, magenta, yellow and black. Most new color laser copy machines automatically convert RGB to CMYK when a digital file is sent, but the results may be off color.
Why are most monitors RGB when most printers are CMYK?
monitors are working with light, thus you use the additive RGB primaries.printers are working with dyes, thus you use the subtractive CMY primaries and black K.
Is green orange and violet secondary colors?
In additive system (RGB): green is a primary but orange and violet are secondary. In subtractive system (CMY): green, orange, and violet are all three secondary.
Why is RGB important?
RGB is the color model used to display color on televisions and video monitors. It is a mixture of light, as opposed to a printed image which is a mixture of ink. It is more important to understand how RGB works, and when to use this color model.
Is the RGB model red green blue an additive model based on the primary colors of light?
True, it is!
What is an RGB document?
RGB is color model and is suitable for screen. All colors in RGB are made from 3 primary colors Red, Green and Blue. There are also other color models like CMYK which is suitable for print. You can convert RGB to CMYK and vice versa in Photoshop.
Does RGB colour model use different tones of red green and blue?
Unlike the primary colors in art, red, blue, and yellow, the three primary colors in light for photography and electronics is red, green, and blue, or RGB. The RGB color model does not use different tones of red, green, and blue.
What happens when you convert RGB to CMYK?
The underlying color model in Photoshop is neither RGB nor CMYK but LAB. It has the widest gamut, which means it can hold more color values than any other model. Of the two other models, RGB has more color values than CMYK does. When you convert from RGB to CMYK, the program first "maps" the RGB values into the LAB colorspace. It then maps the LAB values into the CMYK colorspace. Now, for REAL entertainment...take a pure RGB blue, or a pure RGB green, and attempt to map it into CMYK colorspace. It doesn't work at all. Red maps fine, but the other two go straight to hell.
Why printers use CMYK?
Printers use Cyan, Magenta, Yellow, and Black because each of these is is the inversion of the colors of light, Red, Green, Blue, and White, respectively. These colors generate the RGB(Visible) spectrum, of which all colors can be made. Since printers generate images based on the way that light will be reflected of the paper, rather than directly generating light, it is necessary to take the inverse of each of the colors which light consists of. Unlike LCD screens, which contain pixels which generate their own light, printers rely on images being seen based upon light in the environment. In order to convert an RGB color into CMY, you simply subtract the current value of each from 255 (or 1, depending on your scale). So, for instance, RGB (0, 255, 128) (Green blue) would equal CMY (255, 0, 127).
What is the RGB color model?
Color mode is color space you are working in, determines which colors u can use and number of possible colors. RGB is suitable for screens, and by the way use this color mode for your work inside Photoshop.
What are the differences between YUV and RGB color?
rgb
What is PMS 201 in RGB?
The equivalent RGB value is (177,0,33)
