Below are groups of colors used for safety signs as well as HMI displays.
Colors[edit]
These are the colors specified in ISO Standard 3864-4 in RAL colour standard.[5][4]
Meaning | RAL Name | RAL Number | RGB Hex[6] | Example of Color |
|---|---|---|---|---|
Warning | Signal Yellow | 1003 | #F9A800 | |
Prohibition/Fire Equipment | Signal Red | 3001 | #9B2423 | |
Mandatory | Signal Blue | 5005 | #005387 | |
Safe Condition | Signal Green | 6032 | #237F52 | |
Backgrounds and Symbol | Signal White | 9003 | #ECECE7 | |
Symbol | Signal Black | 9004 | #2B2B2C |
In addition, ISO standard 3864-2:2016 lays out the following colors that correspond to levels of risk.[2] This standard adds "Orange" as an incremental color to the palette above.
Meaning | Background color of panel | Contrast color | Definition | RGB Hex | Example of Colour |
|---|---|---|---|---|---|
Low level of risk | Yellow | Black | RAL 1003 (per ISO 3864-4) | #F9A800 | |
Medium level of risk | Orange | Black | RAL 2010, Munsell 2,5YR6/14G, or Munsell 5YR6/15G | #D05D29 | |
High level of risk | Red | White | RAL 3001 (per ISO 3864-4) | #9B2423 |
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ISO Safety Colors
Safety colors are defined in ISO 3864-4.
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