The playing area used in crown green bowls; normally about 40 yards square that rises to a "crown" in the middle about 1 foot above the edges(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "crown green" in a sentence
"It also resembles the rich dark crown green of the triumphal ivy-wreath, which would give additional pungency to its ironical purpose."