When you compute a forecast in the Modeling module, the Compute Progress dialog reports on the progress of the forecast and presents warning and error messages generated by the forecast compute.

From the Compute Colors tab, you can set colors for Normal MessagesWarning Messages, and Error Messages. There are thirty-two color choices in each of the lists. Change the color by selecting a color from the lists. For any of your changes to take effect, you must re-compute a forecast. 

Compute Colors Tab