The final FastTab in the Device Status Colours FastTab.
The Output screen can be configured to have a different background colour depending upon the status of the device. It is within the Device Status Colours that these numbers can be specified. These colours help those walking around the shop floor to easily identify the status of the machine and attracts attention to those that are on an unplanned stop.
If you want a specific hue of a colour you can use something called a HEX number. This you can usually find by using a search online to find a list of colours and their hex numbers.
The following link gives you that list: http://www.cloford.com/resources/colours/500col.htm