Digital Color

RGB Color Space:
In the digital spectrum, the RGB (red-green-blue) additive color system is used on television screens and computer monitors. When Red, Yellow and Green in the RGB model are mixed together, the result is white.

CMYK Color Space:
The CMYK (cyan, magenta, yellow, and black) color model is another digital spectrum that is specific to the print industry.  When Cyan, Magenta, Yellow and Black (K) are mixed together in the CMYK model the result is Black.

GreyScale:
Using different shades of black and white pixels.Digitally speaking a greyscale value of 0%= white and a greyscale value of 100% = black. a greyscale value of 50%=middle grey.

Bitmap Mode:
uses one of two color values (black or white) to represent the pixels in an image.

Picture of Train as a Bitmap Image

Picture of Train as a Color Image (RGB Mode)

Picture of Train as a Greyscale Image

Pantone Color:

The Pantone Color Matching System is largely a standardized color reproduction system. By standardizing the colors, different manufacturers in different locations can all refer to the Pantone system to make sure colors match without direct contact with one another.

This is a pantone swatch book. It shows you the pantone number of a color and it’s corresponding CMYK translation

The company color is a bright orange (PMS 165). Pantone Matching System 165

Duotone mode

Duotone mode:
creates monotone, duotone (two-color), tritone (three-color), and quadtone (four-color) grayscale images using one to four custom inks.

LAB Color Space:
(Lab) is based on the human perception of color. The numeric values in Lab describe all the colors that a person with normal vision sees. Because Lab describes how a color looks rather than how much of a particular colorant is needed for a device (such as a monitor, desktop printer, or digital camera) to produce colors, Lab is considered to be a device-independentcolor model. Color management systems use Lab as a color reference to predictably transform a color from one color space to another color space.

Indexed Color: mode produces 8‑bit image files with up to 256 colors. When converting to indexed color, Photoshop builds a color lookup table (CLUT), which stores and indexes the colors in the image. If a color in the original image does not appear in the table, the program chooses the closest one or uses dithering to simulate the color using available colors.