Abstract: A numeric color coded filing system for expandable files includes a base member having an adhesive back which is applied to the face of a file along its right side with the right vertical edge of the base member extending outwardly past the edge of the file. The height of the base member is preferably equal to the height of the file and the vertical right edge is folded over onto itself about a vertical line. A plurality of colored labels are provided to be affixed to the edge of the base member. Each label has a pair of identical digits 0-9 printed thereon with a different color being associated with each digit. The labels include an adhesive on the reverse side and are secured to the vertical edge of the base member with one digit of each label being visible from the front of the file and the other being visible from the rear thereof.