Color Mode Of RGB And CMYK For Color Matching Cards

RGB color mode:

　　 Color property :

Simply put nature The color of everything.

RGB color mode is a color standard in the industry. It obtains all kinds of colors by changing the three color channels of red (R), green (G) and blue (B) and the superposition between them. RGB is the color of three channels representing red, green and blue. This standard includes almost all the colors that human vision can perceive. It is one of the most widely used color systems. And where our computer is concerned, most of the monitors are based on the RGB color standard, which is why it is so important to us.

On the monitor, it is through. electron gun The color of the red, green and blue tricolor on the screen can be displayed. The current computer can display 32 bits of color, about one million colors. If the color it displays does not match the color of nature, it is almost impossible to distinguish from the naked eye.

　　 Computer design Scope of application:

Display, RGB color printing, RGB color painting and so on.

Uniqueness:

The color is rich and full, but not ordinary color separation printing.

Mixed color settings (additive mixing):RGB is designed from the principle of color luminescence. Popularly speaking, its color mixing way is like red, green and blue three lights. When their light overlapped together, the color is mixed, while the brightness is equal to the total brightness of the two lights (the brightness of the two lights!), the higher the mixing brightness, the higher the mixing intensity. Colored light can be diluted and brightened by colorless light. If the blue light meets the white light, the result is a brighter pale blue light. After knowing its mixing principle, it is easy to understand the color setting in software. The superposition of three red, green and blue lights is white. The center of the three colors is brightest. Red, green, blue three color channels, each color is divided into 255 orders of brightness. At 0, the "light" is the weakest - it is turned off, and at 255, the "light" is the brightest. When the trichromatic values are the same, they are colorless grayscale colors, while the three colors are the brightest white when they are 255, and they are black at 0.

CMYK Color mode

Color property:

To put it simply, it is the color that is specially used for printing.

It is another color standard specially set for printing industry. It is obtained through the four color changes of C, magenta (M), yellow (Y) and black (K) and their superposition to get all kinds of colors. CMYK is the ink color representing four kinds of printing brush, namely green, magenta, yellow and black, and is also the color of four channels in Photoshop software.

To print, it produces color by controlling the printing of green, magenta, yellow and black ink on paper, and its color is less than RGB color.

  {page_break}

Computer design and application:

Four color printing, four color printing, etc.

Uniqueness:

Color is not as rich and full as RGB color. In PHOTOSHOP, it runs slower than RGB, and some functions will not be used. Because there is no RGB color in color, when the image is changed from RGB color to CMYK color, there will be partial loss of color (from CMYK to RGB without loss), but it is also. Only A color standard that can be used for four-color separation printing.

Blending settings (subtractive mixing):

CMYK is designed based on the reflection principle of light, so its way of mixing is exactly the opposite of RGB, which is "subtractive mixing".

When their colors overlap, colors mix and brightness decreases. Why does this happen? Let's see how light enters the eye through printed matter, and it will be clear.

After printing four different kinds of ink on white paper, the ink has transparency Most of the light rays will first pass through the ink to the paper, and the white paper has a higher reflection rate. Most of the light will pass through the white paper and pass through the ink second times. Then it will shoot into the eyes. At this time, the transmission of the ink will produce a color effect.

In fact, at this time, we seem to be looking at a number of overlapping colored glass. Generally, the light passes through one layer, the brightness decreases, and the colors mix with each other.

The superposition of green, magenta and yellow trichromatic ink is black. The characteristic of subtractive mixing is: the overlay becomes darker and darker.

In software, the four channels of green, magenta, yellow and black are counted by percentages. The 100% is the deepest, the 0% is the lightest, and the black and color mixing almost have little relationship. Most of them exist in order to adjust the brightness and brightness of the color conveniently, and there are many opportunities to use single black in printing.

Like the additive mixture, the trichromatic value is the same as the grayscale color without color.