Another good example.
Pattern first - this is a reticular pattern
Colour next- one colour ( the brown pigment varies in density only)
When scanning the skin , ONE pattern and ONE colour means it is benign and you move on to the next lesion.
There are other features that make it benign - symmetrical / uniform pattern around the periphery / central hyperpigmentation
Now after all the description we can add a label - Clarks Nevus.
Remember that brown pigment is in the epidermis in Keratinocytes predominantly - they collect it from Melanocytes.