Here are some blue-black ones.
Nightmare: Basic Black 5300 and Velvet Midnight 2163
Old Maid of the Depths: Magpie Tears 2353, Mermaid Blue 2329/2333
Rubbed Darkest Mermaid: Magpie Tears 2353, Mermaid Blue 2329, wet sprayed Mermaid Blue 2333
Blackboard: Mermaid Blue 2331, Magpie Tears 2351, w/s Basic Black 5300 (Hkl referred to it in her post also).
