What you really want to watch out for even more so than color change, is meat or poultry that has a bad odor or is sticky, tacky, or slimy to the touch. Let your other senses be your guide in these instances. Read more: The Color of Meat and Poultry - USDA.
Windows Management Instrumentation(WMI) is a set of extensions to the Windows Driver Model that provides an operating system interface through which instrumented components can provide information and notification.
CIM: Common Information Model (CIM) is the DMTF standard [DSP0004] for describing the structure and behavior of managed resources such as storage, network, or software components. WMI: Windows Management Instrumentation (WMI) is a CIM server that implements the CIM standard on Windows.