Difference Between RGB and VGA

When discussing technologies related to electronic displays, RGB and VGA are the most discussed technologies.


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RGB and VGA are similar as they are related to a computer display but have many differences.

It is essential to understand both of technologies so that we can select, discard or use them in our daily life accordingly.

Key Takeaways

  1. RGB stands for Red, Green, and Blue and is a color model used in digital devices to produce images and videos.
  2. VGA stands for Video Graphics Array and is a video display standard for computer monitors and displays.
  3. While RGB is primarily used for color reproduction, VGA is used to transmit analog video signals and does not support color.


The difference between RGB and VGA is that RGB is a colour model that stands for Red, Green Blue, used in various applications. In contrast, VGA is a video standard for Video Graphics Array and is only used for interfacing displays.


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The full form of RGB is Red, Green Blue, known as primary colours, and these primary colours are mixed in various proportions to get the desired colour. It is not limited to displaying interfaces but has many applications wherever any colourful image is formed.

The full form of VGA is Video Graphics Array, mainly used to interface any electronic device to its display. It is an old technology that uses analogue signals to give video signals to the display. Hence the quality of the output signal gets reduced compared to the input signal.

Comparison Table

Parameters of ComparisonRGBVGA
Full FormRed Green BlueVideo Graphics Array
DefinitionIt is a colour model.It is a video standard.
SignalRGB with H and V sync signal.Analog signal
Cable TypeThree-pin cables are coded with different colours.In VGA cable, there is a block having 15 pins.
UsesIt is used in electronic displays, photography, lighting, and computer image processing.It connects electronic devices like computers and projectors to a display unit.

What is RGB?

RGB gets its name using the initials Red, Green Blue. It is a colour model in which these three colours are known as primary colours.

These three primary colours illuminated at different intensities, producing various colours that could count to millions.

It is used for various purposes. Wherever a light source emits different colours, we can find it helpful.

The most common use of RGB is in computer displays, but it can be seen in different fields like photography, lighting, image processing, software editing, and many more.

It uses different methods to display different colours. In hexadecimal form, one colour has 256 values, so combining all three colours, we have a 256×256×256 combination that is 16777216 different colours.

The highest values of all colours give white colour or display, and the lowest values give black colour or display.

In computers or different kinds of monitors, an RGB cable is used. It has three different cables coded with RGB colour.

Whether it is CRT, LCD, or LED, all displays work on basic principles of RGB hence being very old technology; it is a commonly existing technology today.


What is VGA?

Video Graphics Array, commonly known as VGA, is a video display standard developed in 1987 by IBM. It was developed to create a standard of video interference.

In this video, standard colour depth, resolution and transmission are defined.

It uses analogue signals to transfer the data; hence it works for lower quality and lower video display resolution.

It provides different types of colours and resolutions for various cases. For text mode, it provides resolutions of 720 by 400 pixels.

But graphics mode only provides 16 colours at 640 by 480 pixels resolution. We have to lower the resolution to get more colours. It can provide 256 colours at a lower pixel resolution of 320 by 200 pixels.

Now it is developed into many new standards that provide more Colours and resolutions like SVGA. It is only used to bridge displays to different electronic devices, so it has limited use.

A VGA cable has 15 pins in a block, divided into three rows with five pins in each row.

VGA is a very old technology suppressed by its newer versions like SVGA, but it is still known as VGA. With the new technologies in the market, VGA is becoming obsolete.


Main Differences Between RGB and VGA

  1. RGB is a colour model that produces different colours by intermixing the primary colours. But VGA is a video standard used to interface computers and display.
  2. RGB defines the displayed colour of the device. On the other hand, VGA defines colour depth, resolution, and transmission of the displaying unit.
  3. RGB is a concept developed way back before computers that are still applied in many fields, whereas VGA is obsolete technology developed by IBM in 1987 to standardize the video interface.
  4. RGB uses RGB signals besides a horizontal and vertical sync signal. In contrast, VGA uses an analogue signal to process the data from a device to a display.
  5. RGB uses three-pin cables to process Red, Green Blue colours. While VGA uses a different cable having a block at the end embedded with 15 pins.
Difference Between RGB and VGA


  1. https://ieeexplore.ieee.org/abstract/document/1429962/

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