Grey coal slag, not the clear kind, with a tint of blue from the depths.
Blackwater is a cool grey, close to blue.
It can be described as cool, muted, greyish and dusty.
Set in white, because white reads best on it.
Blackwater is a form of pollution produced in coal preparation. In its purification, coal is crushed in a coal preparation plant and then separated and transported as a coal slurry, From the slurry, incombustible materials are removed and the coal can be sized. After the recovery of the coal particles from this slurry, the remaining water is black, contains very fine particles of coal. This blackwater cannot be processed in a water treatment plant.
Read on WikipediaBlack water is a type of bottled alkaline water containing fulvic acid (FvA) and other mineral or vitamin additives. The water is named for its dark and opaque appearance, owing to the addition of the FvA. It has gained popularity as a health trend and status symbol.
Read on WikipediaAcademi, formerly Blackwater, was an American private military contractor founded on December 26, 1996, by former Navy SEAL officer Erik Prince. It was renamed Xe Services in 2009, and was again renamed to Academi in 2011, after it was acquired by a group of private investors. In 2014, Academi and Triple Canopy were consolidated into Constellis Group, under the Constellis Holdings umbrella alongside several other private security firms. Academi is still operational as a subsidiary of Constellis Group.
Read on WikipediaProper noun