Answer: BLACK

AnswerCrossword Clue
blackto make or become black
BLACKJustice of the Supreme Court.
BLACKEpithet for a kettle
BLACKEbon or raven
BLACKPoe's "The ... Cat"
BLACKExpanse also called the Euxine
BLACKLongtime Supreme Court name
BLACKAfrican-American
BLACKRavenous?
BLACK... Sea (waters between Europe and Asia)
BLACKEbony
BLACKNight vision?
BLACKJack of "School of Rock"
BLACKThe circled letters in the first shaded area
BLACKMissouri-Arkansas river, flowing into White River.
blackmember of a dark-skinned people, esp. of Africa or African ancestry
blackto lose consciousness
blackhaving dark skin color
blackthe color opposite to white
blackgloomy
blackcompletely either one way or another, without any intermediate state
blackwicked
blackto blacken (to defame (to destroy the reputation of)) / being of the darkest colour
blackblack clothing
blackwithout light
blackearning a profit
blacklacking brightness or color
BLACKMagic color?
BLACKChess choice
BLACKRoulette bet
BLACKSupreme Court justice for 34 years
BLACKLike coffee sans cream
BLACK.. belt
BLACKCoffee preference
BLACKSans cream
BLACKCoffee order
BLACKEven-money roulette play
BLACKServed without milk or cream
BLACKEnveloped in darkness
BLACKPanther color