Describe a single color that makes a New York unique

Use this poem to answer question https://www.newyorker.com/magazine/2016/09/19/the-statue-of-libertys-beguiling-green Describe a single color that makes a New York unique. Be sure to reference one of Whitman’s poems in your essay about New York. Use Whitman poem to make reference https://www.poetryfoundation.org/poems/45470/crossing-brooklyn-ferry