There are two color modes in every image. Those are –
1) CMYK: CMYK means Cyan, Magenta, Yellow, Black mode. CMYK mode is used to printing images and also describes the printing process itself. When we print images in offset then it’s a must thing to use the CMYK mode. The CMYK mode practically or entirely works on a lighter like the white background. It also reduces the brightness from the background otherwise it would be reflected.
2) RGB: RGB means Red, Green, Blue mode.RGB mode is used for all kinds of digital images because all the electronic devices show images in RGB mode on their screens such as TV and video cameras, image scanners, video games, and digital cameras. RGB mode means a color combine with three colors red, green and blue.