There are no standards on Property ID color selection. Black is the most common. Plus, it is the most durable outdoors. Red is next most popular in that it can be spotted easily against most equipment.

Many organizations color-code their assets by type or by department. Computer equipment is red, furniture and fixtures are green, maintenance is blue, etc.

Note that the printing does not have to be "in reverse" (i.e. silver or white text on a solid colored background). By switching the Background and Type color around, you get a silver or white tag.