how to change the color from RGB to CMYK




















RGB color is often referred to as additive color because we can make the white color by adding the R, G, and B
Additive color is used for lighting, television and computer monitors.
We monitor, for example, creates color by emitting light through red phosphor, green, and blue.
Most of the visible spectrum can be represented by mixing red, green,
and blue (RGB). Where the colors overlap, will create cyan, magenta, and yellow.

Additive colors (RGB)
R. Red
G. Green
B. Blue

We can work with RGB color mode, which is based on RGB color model. In RGB mode,
each RGB component can use the values range from 0 (black) to 255 (white). For example,
bright red color may have an R value of 246, the value of G 20, and the value of B 50.
When the value of the three components are the same, the result is the color gray.
When the value of all components is 255, the result is pure white, when all the components has a value of 0, the result is pure black.























CMYK
While the RGB model depends on the source of light to create color,
CMYK model is based on light-absorbing quality of ink printed on paper.
Color that is not absorbed is reflected back into your eyes.
Combining pure cyan (C), magenta (M) and yellow (Y) will produce a black pigment.
For this reason they are called subtractive color. Black (K) ink is added for better shadow density.

Subtractive color (CMYK)
C. Cyan
M. Magenta
Y. Yellow
K. Black

We can work with the colors using CMYK color mode, which is based on CMYK color model.
In CMYK mode, each process CMYK inks can use a value ranging from 0 to 100%.
Light colors are assigned small percentages of process ink colors, dark colors have a higher percentage value.
For example, bright red might contain 2% cyan, magenta 93%, 90% yellow, and 0% black. In CMYK objects,
low ink percentages are closer to white, and the high percentage is closer to black ink.
CMYK dugunakan when we prepare a document to be printed using process inks.


how to change RGB color image into CMYK color
Select the RGB color image

Select image menu> mode> click CMYK color.
Automatic image will instantly change into CMYK color image








































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