How to record the last bit of dark blood at the end of period?

The only options are spotting light, medium, and heavy but this flow is so light. It only lasts a day or two, and is such a tiny amount that comes out that the pad is just kind of stained dark and not even a quarter soaked in a full day. It happens at the very end of my period and it's so little that I can't really call it light flow. How do I record this? As spotting? Light flow?