सामूली गोधूमवर्णा । इति ॥ कZ_०२.११.९१ ॥
sāmūlī godhūmavarṇā | iti
Sāmūlī có màu lúa mì (godhūmavarṇā) — như vậy.
They provide widely understood, low-cost reference points for inspectors across regions, improving consistency without instruments.