Learn Finnish: Kukka on violetti. - The flower is violet.

Finnish doesn't have articles like "a", "an", or "the". The word kukka can mean "a flower" or "the flower" depending entirely on the context. In this sentence, because kukka is at the beginning, it usually implies we are talking about a specific, known flower, so "the flower" is the best translation.

Why is violetti in its basic form instead of the partitive case?

When describing a single, countable object like a flower (kukka), the adjective stays in its basic form (the nominative case). If we were describing an uncountable substance, like water or juice, we would have to use the partitive case for the color (for example, Mehu on violettia).

Are there other words for purple in Finnish?

Yes! Violetti is the most common word for purple or violet. You will also hear liila very often, which usually means a lighter purple or lilac. Another word is purppura, but that refers specifically to a deep, dark royal purple and is less common in everyday speech.