# ColorBar Display Device States

## Overview

Color Bars are used to show current device state for quick reference of the system firmware.
The Color Bars supported by Q35 are listed below.

## Color Bar Legend

![Color Bar Example](Images/Colorbars.jpg)

| Color | Description | Location where Device State is set  |
| ---   | --- | --- |
| Red   | Secure Boot Disabled | MU_OEM_SAMPLE\OemPkg\DeviceStatePei\DeviceStatePei.c |
| Yellow and Grey Caution | Unit Test Mode (Unit Tests Compiled into Firmware) | Platforms\QemuQ35Pkg\QemuQ35Pkg.dsc |
