23 and me worth it?

Ha

My husband and I are full Korean.. as far as I know.. but my daughter.. like her maternal grandmother has SUPER light hair and VERY fair skin. I have fair skin as well but my hair isnt and never was as light as hers. My maternal grandfather doesnt look Asian at all. He was 6'5 and very built. My uncle says they might be mixed but hes not sure because theres some dark history that my grandfather refused to discuss. My grandmothers sister was also captured and raped by Japanese soldiers during the war. Is it worth it to do the dna test? Has anyone ever tried it?