Appendix 1 to ETSO-C113b - Colour

• ED Decision 2020/011/R found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

###### Appendix 1 to ETSO-C113b – Colour *ED Decision 2020/011/R* SAE AS8034C, Section 4.3.4, lays down colour-coding requirements. This Appendix provides additional guidance on colours. 1. Display features, precipitation, and turbulence areas should be colour-coded as depicted in Table A1 and Table A2 respectively, unless otherwise specified by the ETSO application being displayed. ***Table A1*** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> Display Feature</p> </td> <td bgcolor="#808080"><p align="left"> Colour</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Warnings</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Red</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Flight envelope and system limits, non-normal sources</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Red/Amber/Yellow/White as appropriate </p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Cautions</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Amber/Yellow</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Scales and associated figures</p> </td> <td bgcolor="#d9d9d9"><p align="left"> White ^Note</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Earth</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Tan/Brown</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Sky</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Cyan/Blue</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Engaged Modes/normal conditions/safe operation</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Green</p> </td> </tr> </table> **Note:** Use of the colour green for tape elements (for example, airspeed and altitude) has also been found to be acceptable if the colour green does not adversely affect flight crew alerting. ***Table A2*** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Precipitation and Turbulence</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Colour</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Precipitation up to 4 millimetres per hour (mm/hour)</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Green</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Precipitation 4–12 mm/hour</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Amber/Yellow</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Precipitation 12–50 mm/hour</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Red</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Precipitation Above 50 mm/hour</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Magenta</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> Turbulence</p> </td> <td bgcolor="#d9d9d9"><p align="left"> White or Magenta</p> </td> </tr> </table> 2. Background colour (grey or other shade) may be used to enhance the display presentation. However, the colour selected should not impair the use of the overlaid information elements. Labels, display-based controls, menus, symbols, and graphics should all remain identifiable and distinguishable. 3. Colours should track the brightness so that the chrominance and the relative chrominance separation are maintained as much as possible during day-night operations. [Amdt ETSO/11] [Amdt ETSO/16]