'Violeta' is the actual translation, though Morado/a (Purple) is often used as well.
Verde (Green) Violeta (Violet)
In English, translated literally, it's 'yellow violet'
the color violet is spelled the same in French. The flower is 'des violettes' (fem., usually plural).
Favorite color in Spanish is color favorito.
As an adjective, the word violeta is used.
"das Veilchen" is the flower. Violett is the color.
Violet is as beautiful as a pink rose/It was as purple as the color violet.
Que color quieres?
color de ojo
¿De qué color es?
The name Yolanda is said the same in Spanish as it is in English. This name is Latin and French in origin and means violet.
For the color brown, you say: marrón