Color modes

Color modes :

In Photoshop we have different color modes like RGB, CMYK, Gray scale, Bitmap, lab ect. To set color mode, Go to image menu on menu bar than select mode option than select required mode.

RGB:

RGB color mode is most versatile and widely used color mode for Photoshop. 

It is the color mode that which digital cameras save your photos.

R-RED

G-GREEN

B-BLUE

The combinations of Red, Green, Blue will give different colors. 

This mode is choice for export to the web, mobile devices, inkjet printers  etc…

CMYK:

In CMYK color mode each pixels is assigned a percentage value for each of the processors inks. 

Pure white is generated when all four component  values 0%. 

For black color all percentages will be zero like cyan, magenta, yellow and black only contain 100%. 

CMYK is also a standard color mode which represent exact range of color   

GRAY SCALE:

Gray scale color mode is not  represent as neither black nor white. 

Gray scale color mode provide 254 shades and pure white &  pure black colors. 

We will able to convert into gray scale from any color mode, but not convert gray scale to any color mode.

When you convert color picture into gray scale and saved the information about color on the particular pixel will be  delete permanently.

BIT MAP COLOR MODE:

In bit map color mode all the pixels are individually are in 100%white.  

Bitmap color mode not entertain layers, filters or color adjustments.

INDEX COLOR MODE:

A file in index color mode contain just one channel.

It contains 256 color shades. Each pixel numbered from 0-255, to represent  a color. 

Most probably in GIF we will observe this color mode.

LAB:

A Lab color space is a color-opponent space with dimensions L for lightness and a and b for the color-opponent dimensions, based on non linearly compressed (e.g. CIE XYZ) coordinates. 

The terminology originates from the three dimensions of the Hunter 1948 color space, which are L, a, and b.