Tbh, mail is easy. Just do a checkerboard pattern.
Yes, all the Numenoreans did mix, and were dissolved.
"but it was a stronghold of the King's Men, who were afterwards called the Black Númenoreans, corrupted by Sauron, and who hated above all the followers of Elendil. After the fall of Sauron their race swiftly dwindled or became merged with the Men of Middle-earth, but they inherited without lessening their hatred of Gondor."
"The sons of [Castamir] and others of his kin, having fled from Gondor in 1447, set up a small kingdom in Umbar, and there made a fortified haven. They never ceased to make war upon Gondor, attacking its ships and coasts when they had opportunity. But they married women of the Harad and had in three generations lost most of their Numenorean blood...."
Ithilion, Discussions Moderator(Auta i lómë) 01:30, May 26, 2017 (UTC)