This is the 2734th most frequent Japanese word.
緑色
Green color.
Here, '緑色' modifies '葉っぱ', indicating the color of the leaves.
緑色の葉っぱが風に揺れている。
The green leaves are swaying in the wind.
'緑色' functions as the descriptive color of '芝生', describing its visual appearance.
公園の芝生は緑色でとても綺麗です。
The lawn in the park is green and very beautiful.
In this sentence, '緑色' qualifies 'シャツ', specifying the color of the shirt being worn.