彡 shān bristle; hair
Made with 3 strokes.
Three hairs that can represent a brush
Ancient small seal form 

Sounds same
山 shān (mountain)Different tone
陕 shǎn (Shanzhou) ; 善 shàn (benevolent)Radical
Index 59 used in: 彩 cǎi (color) ; 影 yǐng (picture)
Stroke order for character 彡, kindly provided under Wikimedia creative commons license ➚