紫 + Noun / 紫色 + 的 + Noun
The character 紫 (zǐ) means "purple" or "violet" and is used as both a noun and adjective for the color. In scientific contexts, it appears in compound words like 紫外线 (ultraviolet rays). It is one of the basic color terms in Chinese.
她今天穿了一件紫色的外套,很好看。
Tā jīntiān chuān le yī jiàn zǐsè de wàitào, hěn hǎokàn.
She wore a purple coat today, and it looks great.
紫外线太强了,出门要记得涂防晒霜。
Zǐwàixiàn tài qiáng le, chūmén yào jìde tú fángshàishuāng.
The ultraviolet rays are too strong; remember to apply sunscreen when going out.
花园里开满了紫色的薰衣草。
Huāyuán lǐ kāi mǎn le zǐsè de xūnyīcǎo.
The garden is full of purple lavender in bloom.