A type of printer that produces characters and illustrations by striking pins against an ink ribbon to print closely spaced dots in the appropriate shape. Dot-matrix printers are relatively expensive and do not produce high-quality output. However, they can print to multi-page forms (that is, carbon copies), something laser and ink-jet printers cannot do.
Thats a definition, still used where muti page is required. Still remember how noisy they were.But in the early '90 's all I could afford.
I might be wrong, but think you could get at least 'red' by playing with the ribbon.Even pics/graphics were possible (but terrible)