Difference Between Similar Terms and Objects

Difference Between RGB and VGA

lcd_amRGB vs VGA

RGB and VGA are two terms that are commonly used when discussing technologies that are related to computer displays. VGA stands for Video Graphics Array and it is an analog standard that is used for interfacing a computer to its display. On the other hand, RGB (Red, Green, Blue) is a color model that mixes the three primary color in order to come-up with the desired color from the entire spectrum. While VGA is primarily used to bridge displays to their source, RGB has a much wider spectrum of applications. Aside from the obvious use in displays, it is also used in lighting, photography, and even in the software editing and processing of computer images.

RGB is already an established concept long before the advent of computer as people have already noticed that mixing these three colors in varying amounts would result in another color. The information on color combinations is then recorded to have a table of known values. VGA was developed by IBM to create a standard interface that would be used with its own line of computers. The standard included the resolution to be used along with color depth, interface connector, and the electrical signaling to be used. Other manufacturers began adopting the standard and it was later used by the entire computer industry.

VGA is a very old standard that has been succeeded by a lot of other standards that are better in many aspects. This is even more apparent as the display interface has moved to digital with HDMI. The only remaining part of VGA that is in use today is the resolution (640×480). Operating systems revert to this resolution whenever problems arise as it is supported by virtually all hardware in use today and it ensures that the operating system is able to startup. Since RGB is a rather general concept that extends beyond technologies and standards, it is still in use today. Most displays, regardless of whether its CRT, LCD, or LED, still use the basic principles of RGB in producing the images.


1. RGB is a color model while VGA is a video standard

2. RGB is used in a wide variety of applications while VGA is only used in interfacing displays

3. RGB defines the combination of colors while VGA defines resolution, color depth, and transmission

4. RGB is still used considerably while VGA has been superseded by better standards

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1 Comment

  1. VGA uses RGB + vertical and horizontal sync, RGB without sync is used in TVs on SCART/euro connector (PAL Europe only) and JP21 (NTSC Japan only) and alongside component provides the best possible quality of old, mainly analog and some older digital devices such as VHS and DVD players, Super Nintendo or Sega Mega Drive/Genesis. American TVs do not support RGB signal.

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