She has a pair of dark brown eyes and hair.

[Andrew Awence]

Is it correct and to say

She has a pair of dark brown eyes and hair. or shall we change it to the following:

She has a pair of dark brown eyes and dark brown hair.

Thanks

 

[5jj]

The second is better than the first, though I see no need for 'a pair of.'

 

[emsr2d2]

Is it correct and natural to say "She has a pair of dark brown eyes and hair" or shall we change it to the following: should I say "She has a pair of dark brown eyes and dark brown hair?

Thanks.

If you're asking us only about the use of the adjective before "hair", then use "dark brown" before it. Otherwise, it looks like you're describing her eyes but then simply saying she has hair!
The biggest problem with the sentences is that we would never say that someone has "a pair of eyes". We just say "She has dark brown eyes".
To avoid repetition of the adjective, say "Her eyes and hair are dark brown".
I'm genuinely surprised that someone whose native language is English (as your member profile claims) thinks that "a pair of eyes" is natural. Did you really grow up in a household where American English was the predominant language spoken by all members of the family?