Nor would I expect them to. For that matter, neither do my Jewish, Catholic nor Islamic Brethren discriminate against me for being Protestant Christian. Nor do my Liberal, Conservative nor New Democrat Brethren discriminate against me for voting Reform. I guess I am clearly of the opinion that to refuse a man on the basis of his colour is an unMasonic act. Each of us enters the world completely unfettered.
Slavery is something imposed upon a human being by another at some moment after birth.
I would commend to you a study of Prince Hall Masonry. You might be surprised at what you learn about its origins and how it went from being a regular Lodge under the UGLoE to a clandestine movement and is now returning to a degree of regularity by some jurisdictions. You might find it very interesting to look over some of the materials available from the Masonic Renewal Committee of North America. Following instruction from the Conference of Grand Masters, they have done considerable research on Masonry's current reality and have developed several materials for Lodges and Brethren to use. Your own Grand Lodge Office may have some of these available or can certainly provide you with an address.