Siemens SIMATIC HMI Series Getting Started page 37

Color settings
The Comfort HMI devices can display graphic objects with a color depth of 16 bit and 32 bit.
For this you have to configure the graphic objects with the required color in the project. To do
this, select the required "Color depth" in the "Runtime settings" of the HMI device in WinCC
under "General":
You also set this color depth in the Control Panel of the HMI device:
Note
Objects with greater color depth require more computing power and memory on the HMI
device. If you are monitoring and controlling time-critical processes, use a lower color depth
for the configuration.
Migration Guide Comfort Panels
Getting Started, 03/2011, A5E03478626-01
Migrating a project
3.4 Switching over the HMI device
37