Neutral color running through the four longest puzzle answers

Question:

Answer:

ECRU

Length:

Similar Crossword Questions:

Break suggested by the starts of this puzzle's four longest answers
It's zero in free-fallÂ—and, put another way, a hint to how the four longest puzzle answers were formed
What each of the other four longest answers in this puzzle is
Julian Assange's controversial website, and a hint to what's missing from this puzzle's four longest answers
Charge carrier that forms a bond within each of this puzzle's four longest answers
Boat lifters found in this puzzle's three longest answers
Mate, and a hint to the starts of this puzzle's four longest answers
Final (and a word that can precede the first word of this puzzle's longest answers)
The word, as suggested by the saying formed by the ends of this puzzle's four longest answers
Communications device described by the first words of the puzzle's four longest answers
Critter that can follow the ends of this puzzle's five longest answers
Bar found at the end of this puzzle's seven longest answers
Siesta taken by this puzzle's longest answers
Child in seven of this puzzle's longest answers
Theme of this puzzle hidden in the seven other longest across answers
Action hero's garb, and what each first word in this puzzle's four longest answers is
Peak that's hidden in the four longest puzzle answers
Govern, or word that can follow the first word of the four longest puzzle answers
Driveway stuff (and word that's hidden in this puzzle's four longest answers)
Elite Navy group that's fittingly camouflaged in the four longest answers in this puzzle
Each of this puzzle's four longest answers begins with one
One is hidden in each of this puzzle's four longest answers
"We're on to you!" (and a hint to how this puzzle's other four longest answers were created)
European acme, and word hiding in this puzzle's 5 longest answers
A kind of one ends each of this puzzle's four longest answers