It's always difficult to analyse isolate images and better to the physician if you see the patient directly.
This lesions remember me scleroderma, but would be interesting after correct inspection you feel the skin through palpation.
It looks like the salt and pepper skin common in scleroderma. The following article published in new england journal of medicine reveal a similar finding. But be carefully, It is importante to evaluate this findings with the laboratory and patients' anamnesis.
Another important differential diagnosis would be the relationship with peripheral arteriovenous insufficiency which can cause a very similar findings.
Cicatricial findings due other types of dermatitis may also be a possibility.
I would just say brown or brownish pigmentation. Considering the very likely pitting oedema (the legs look swollen); the most likely cause is stasis-related pigmentation. Of course there likely has been some extravasation of RBCs so that would classify as purpura, although not related to vasculitides or any purpuric dermatoses.
Background and Design:
Analysis of the most frequently cited dermatology articles and the journals in which they appear identifies and emphasizes the impact of works of colleagues and predecessors, recognizes key advances in cutaneous medicine and surgery, and adds useful data about historical developments in dermatology. Use of citation analysis...