What is 40 shades of green?

Here's some information about "40 Shades of Green" in markdown format, with links to hypothetical wiki pages:

"40 Shades of Green" is a popular song, most famously performed by <a href="https://www.wikiwhat.page/kavramlar/Johnny%20Cash">Johnny Cash</a>. It's considered a classic Irish ballad, though it wasn't actually written by an Irishman.

The song was written by <a href="https://www.wikiwhat.page/kavramlar/Johnny%20McEvoy">Johnny McEvoy</a>, an Irish singer-songwriter, in 1961. It quickly gained popularity and has been covered by numerous artists.

The lyrics describe the beauty of the <a href="https://www.wikiwhat.page/kavramlar/Irish%20countryside">Irish countryside</a>, focusing on the various shades of green that dominate the landscape. It evokes a sense of nostalgia and love for <a href="https://www.wikiwhat.page/kavramlar/Ireland">Ireland</a>. The "forty shades" are meant to represent the rich variety of greenery found across the island. The song frequently appears in lists of <a href="https://www.wikiwhat.page/kavramlar/Irish%20folk%20songs">Irish folk songs</a> and is often associated with <a href="https://www.wikiwhat.page/kavramlar/St.%20Patrick's%20Day">St. Patrick's Day</a> celebrations.