Which area in Korea where light eye color is common?

I was watching a drama and this korean actress name Go Ah Ra has lightbrown/yellowgreen eyes... and i thought she was wearing contact lenses but i found out that she came from an area in Korea where light eye color (not dark brown/black) is common).Which area in Korea where light eye color is common?
Well, Korea hasn't really mixed with other races in its history, so black is by far the most common eye color in Korea (I'm korean myself so i would know). So, yah. There's no area that has light colored eyes.Which area in Korea where light eye color is common?
It is uncommon to have a ';light eye colour'; and Go Ah Ra wears contact lenses. Most koreans have black to brown colours and some I have seen having a light coloured brown, which I often assume they are either mixed but not. But with Go Ah Ra's case she has a dark brown eye colour, it even says it in her profile.
lol. i've never heard of an area with light'eyed color. She was probably wearing colored contacts. lol. some people actually do that these days.
Go Ah Ra wears colored contact lenses. Most Korean actresses do these days.