Do you know, my dear, what is the difference between color systems,
specifically between RGB and CMYK, they are the most common
, there are others such as YUV and YCbCr and others,
in Photoshop you can find a detail of color systems like this
RGB color mode (millions of colors)
CMYK color mode (four-color printed)
Index mode (256 colors)
Grayscale mode (256 colors)
Bitmap (2 colors)
This is not the topic of the article
but the main topic is
the difference between RGB and CMYK systems and The uses of each type
Unfortunately, many designers do not care about this matter,
and it is believed that the color system will be modified automatically
when printing, but this is not correct.
The conversion is not done exactly the same,
rather there is a deficiency in some color values,
which are not included when printing.
We explain together each color system separately,
to know what technology this system is built upon.
Firstly, RGB system
The letters indicate red, green, blue
R - is red
G - green
B - Blue
They are the basic colors that, when mixed, produce the colors
And when mixed with intensity, it produces white,
and when it is absent, it produces black
This system is called light or fluorescent colors,
and therefore it is the ideal choice for different display devices,
screens and cameras
It can be modified to one or all of the three basic colors
to obtain another color
Usually the scale is for selection from 0 to 255
The greater the value you add to the primary color,
the more intense it will be, and vice versa,
when you reduce the value to the color of them,
it becomes dark or dark.
For your information, the RGB system is not a unified system,
as some think, but rather it is multiple versions such as,
sRGB and Adobe RGB
This system is not ideal for printing as it slows down the printing process
because the printer switches the color system before completing the process
However, there are a few more economically expensive printers
that support RGB printing without converting
But it is best used for
photography, projectors, TV and digital broadcasting devices or on the web
Second, CMYK color system
Yellow Y- Yellow
Black which is Key K- Black
CMYK system is the opposite of RGB color,
when controlling, as we mentioned
that the absence of color in the RGB system produces black color
The absence of color in the CMYK system produces white!
The difference can be easily identified,
as mixing the four colors results in a more accurate color image
than the three-color system.
The output of tones cannot be obtained in an RGB system
Certainly, you find that the images sent to you,
on the web or in the mail,
are less accurate and the colors do not match,
because most browsers do not support the CMYK four-color system and depend,
as we mentioned earlier, on the RGB system
It should be remembered that basic colors such as
red, blue and green are not bright in the CMYK system
Now, after reviewing the characteristics of each color system,
we find that the RGB system depends on adding colors to show them
As for the CMYK system,
it depends on removing color by reducing its degree to white,
which is best suited for printing
Like the color of the paper is white
Not suitable for use on web or display screens
You can convert the color system between RGB and CMYK easily
It can be done via as follows
Open the image whose color scheme you want to change.
Click Image from the top horizontal menu.
Click on the first option in the list called Mode.
Click on the little black arrow and select CMYK.
RGB system is a fluorescent color system, used for display and not for printing,
due to the intention of printers supporting it to produce faded images
The CMYK system is a tracking system,
which is the best and on which most printers rely.
It is not used on the web or display devices,
you will find that the colors are too saturated.