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In this article we explain what network cable colors mean.


Often network cable vendors assign colors to help identify the connection type and purpose, or to distinguish their cables and connections from other vendors.

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Ethernet Cable Colors and Their Purpose

The colors of Cat5, Cat5e, Cat6 and Cat6a ethernet cables represent a specific application or system such as network connectivity or equipment connections. This is not to be confused with the color coding of the twisted internal wires contained within each CAT cable. The color of the outer jacket has nothing to do with the cable function itself, it simply highlights the purpose of connection.

Common Ethernet Color Coding Assignments

Often vendors assign specific colors to help identify the connection type and what it is being used for, or to distinguish their connection from other vendors. The colors aid with cable management and while there is no industry standard, below is an example of coloring coding some businesses may use:

  • Blue - Network Connectivity
  • Yellow - Camera
  • White - Security
  • Grey - Interconnects/Jumpers
  • Black - Equipment/Workstation
  • Red - Phones/Emergency Systems

Cable color management can also be used to differentiate between security levels or networks such as DMZs, production LANs, management LANs and Test LANs. Since some companies or vendors have their own labeling preferences, it’s recommended to identify the colors and uses from the most current schematic available.

Ethernet Cable Color Coding by Year

Colored cables can also be used to indicate the age of the wiring installed. Some vendors identify the year work was performed by choosing a specific color. This allows customers and technicians to quickly identify the age of their installed cabling and when the work was performed. Below is an example of network cable color coding by year installed:

  • Purple - 2017
  • Blue - 2018
  • Yellow - 2019

Commercial Cable Labeling Standards

Commercial applications, especially data centers, should check proper building standards such as ANSI/TIA-606-B , Administration Standard for the Telecommunications Infrastructure of Commercial Buildings. This is a general standard for cable labeling on all types of premises. However, local building codes will supersede the 606B standard and should be checked before running cables.

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