I have a question about expressing hair color in Korean. For example, how would I say in Korean that my girlfriend has brown hair? What about saying someone is a red-head, or is blonde?
I have seen a few different ways to express hair color in Korean.
빨강 머리 (or alternative spelling 빨간 머리) is a widely used term in Korean for a redhead. It literally means "red head."
나는 빨강머리가 되고 싶네! I want to become a redhead! 저는 빨간 머리입니다. I am a redhead.
Similarly, a brunette (brown hair) is often referred to using the term 갈색 머리 (literally, brown head). I have also heard 브루네트 ("brunette").
To twist things up slightly, a blonde is commonly referred to by the term 금발 머리.
금발 머리인 여자가 김밥을 먹었어요. The blonde ate some kimbap.
Although there is some debate as to the grammatical legitimacy of the term 금발인 (with the 인 being the person 인 人), I have seen it used as a noun. Most of these instances were informal and on social media or in 만화. The Korean girls I inquired about on this matter seemed to agree that 금발인 can be used as a noun stand alone, however they had no idea if it was a dictionary approved term. They seemed to use it more as slang perhaps. I am not seeing this as an authoritative, be all end all, my way or the highway answer. I am just passing along what I have seen.
You may also hear the English word itself:
블론드의 여자 (blonde woman).
There are Korean words using Chinese characters that end with '-발' which literally means 'hair'.
흑발 (Black hair), 금발 (Gold/Blonde hair), 백발 (White hair), 적발 (Red hair), 황발 (Yellow/Blonde hair), etc.
You can use the following sentences.
그녀의 머리는 (머리카락은) 검은색(흑발)이야.
그녀는 검은색(흑발)의 머리를 가지고 있어.
그녀는 흑발이야. (Note that it is not as broadly used as 그녀는 금발이야) , etc.
You need to note that '적발' and '황발' are very rarely used in Korean. There is no name using Chinese characters for brown hair. If you use '갈발', it won't be understood.
Another way is to use adjectives such as
검은 머리 (Black hair), 노랑/노란 머리 (Gold hair), 하얀 머리 (White hair), 빨간/빨강 머리 (Red hair), 갈색 머리 (brown hair), etc.
There are so many ways to express hair color using the words above listed.