The brush is from Logan at Lowborn supply, the color combination is called Tidal. He makes brushes in the same color combination occasionally. He use to have an etsy shop, but he may have moved on from that now. I have put that brush through the ringer so there are some small scuffs/scratches that could be polished out, and as always the pictures don't do it justice.
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No wonder I love it. I have 4 or 5 of his handles. I really like the color combination though.