Glen
A glen is a valley, typically one that is long and bounded by gently sloped concave sides, unlike a ravine, which is deep and bounded by steep slopes.
Read on WikipediaEmerald valley, where hillsides curve and meet a bright green floor.
Glen is a bright green.
It can be described as bright, vivid, brilliant and glowing.
Set in black, because black reads best on it.
A glen is a valley, typically one that is long and bounded by gently sloped concave sides, unlike a ravine, which is deep and bounded by steep slopes.
Read on WikipediaProper noun
Noun