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Cat5 Color Code: The Ultimate Guide

If you are working with network cables, specifically Cat5 cables, it’s important to understand the color coding system. The Cat5 color code is a standard set of colors used for structured cabling that is used for Ethernet connections. Whether you’re setting up a new network or troubleshooting an existing one, knowing and understanding the Cat5 color code is essential.

Understanding the Cat5 Color Code

The Cat5 cable comprises four twisted pairs of copper wire, making a total of eight wires. Each wire is color-coded with a solid color and a striped color. The standard color coding for Cat5 cables is as follows:

Wire Color Wire Color
White/Orange Orange
White/Green Blue
White/Blue Green
White/Brown Brown

The color coding is crucial for correctly terminating the cable with an RJ45 connector, as well as for ensuring that each end of the cable is wired identically. Therefore, it’s vital to follow the standard Cat5 color code for consistency and reliability in network connections.

Importance of Following the Correct Color Code

Following the correct color code when terminating Cat5 cables is essential for several reasons:

  • Consistency: Standardizing the color code ensures that network technicians and installers can easily understand and replicate cable terminations.
  • Troubleshooting: When a network issue arises, following the color code makes it easier to identify and diagnose wiring problems.
  • Compatibility: Adhering to the standard color code ensures compatibility with networking equipment and devices.
  • Reliability: Properly terminated cables lead to reliable network connections and reduced signal interference.

Network Cable Color Coding Standard

The color coding standard for Ethernet cables, including Cat5, is defined to ensure uniformity across installations. When working with Ethernet cables, it’s important to keep the following color coding standard in mind:

Switch the solid Green (G) with the solid Orange, and switch the green/white with the orange/white. This standard ensures that the cables are terminated consistently, allowing for seamless connectivity within the network infrastructure.

Cat5 Color Code: Essential Guide


Consequences of Not Following the Color Code

Failure to adhere to the Cat5 color code can lead to various issues in network cabling. These consequences may include:

  • Potential connectivity problems
  • Signal crosstalk and interference
  • Difficulty in troubleshooting and debugging network issues
  • Incompatibility with industry standards

Frequently Asked Questions Of Cat5 Color Code: Essential Guide

What Is The Order Of Color In Cat5?

The order of colors in CAT5 cable are orange, green, blue, and finally, brown. Within each color pair, white comes before the non-white color.

How Do I Know If My Cat5 Is A Or B?

To identify if your CAT5 cable is A or B, check the color coding pattern. For CAT5 A, the sequence is green-white, green, orange-white, blue, blue-white, orange, brown-white, and brown. For CAT5 B, it’s orange-white, orange, green-white, blue, blue-white, green, brown-white, and brown.

What Is Rj45 Cable Color Code?

The RJ45 cable color code follows a standard pattern: orange, green, red, blue, and white. It’s crucial for proper termination and network functioning.

How Do I Remember My Rj45 Color Code?

To remember your RJ45 color code, use the acronym “BROG,” representing blue, orange, green, and red. Additionally, utilize mnemonic devices or color coding charts to reinforce memorization. Regular practice and repetition will improve your recall of the color coding system.


The Cat5 color code is a fundamental aspect of working with Ethernet cables. By understanding and following the standard color coding, you can ensure the reliability, consistency, and compatibility of your network connections. Whether you’re configuring new network infrastructure or maintaining an existing one, adherence to the Cat5 color code is essential for optimal network performance.

For more information and practical demonstrations, be sure to check out video tutorials and resources from reputable sources such as and industry-specific forums like Quora. Understanding the Cat5 color code will empower you to create robust and efficient network setups.

Keep in mind that proper cable termination techniques, along with accurate color coding, will contribute to the overall stability and dependability of your network infrastructure.