noun, noun which may take the genitive case particle 'no'
Refers to the color violet, like that of the violet flower. Used as both a noun and a no-adjective.
彼女はすみれ色のドレスを着ていた。
She was wearing a violet dress.
壁をすみれ色に塗った。
I painted the wall violet.
紫 is a broader term for purple, while すみれ色 specifically refers to the lighter, bluish violet of the violet flower.
Compound of すみれ (violet flower) and 色 (color). The kanji 菫 is used for the violet plant, but the kana spelling is more common for the color.