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SESK: Stuff Everyone Should Know · sesk.info/ham-dmr-color-code

What is the color code on a DMR repeater system?

An access code your radio needs to use that repeater.

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  1. A code that sets the repeater offset automatically
  2. A code naming the CODEC the repeater decodes
  3. An access code your radio needs to use that repeater ✔

Why: A DMR repeater listens only for radios programmed with its color code. If your radio has the wrong one, the repeater ignores you.

Huh, didn't know that: Despite the name, a DMR color code is a number, not a color.

The dad joke
My DMR radio failed the color code test. It was feeling a little blue.
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References

Answer: An access code your radio needs to use that repeater. A DMR repeater listens only for radios programmed with its color code. If your radio has the wrong one, the repeater ignores you.

  1. 2026-2030 Technician Class Question Pool, T2B12 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    An access code which must be programmed into a DMR transmitter to access a specific repeater
    Checked 2026-10-09.

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