cruzist

I read somewhere that modern humans came out of Africa about 150,000 years ago, and largely replaced previous homos living in Europe and Asia. Presumeably these modern peoples were all brown eyed. It has occured to me that blue eyes in people may be a very recent development, but I have been unable to find any discussion of how old this trait might be. Can anyone answer this question or point me in the right direction? I am not a scientist, but just have a question. thanks