Silvery-green is an interesting and unique color that can be difficult to find antonyms for. However, some words that could be considered as antonyms for the color silvery-green include dark, dull, black, brown, and gray.
Dark is opposite to light or bright colors, hence, it's an antonym to silvery, which is a reflective and light color. Dull describes a lack of brightness or intensity, which is the opposite of the reflective and bright properties of silvery-green. Black, brown, and gray are all colors that are much darker and more subdued than silvery-green. To contrast with silvery-green, they would create a more somber and dull color scheme.
Overall, antonyms for silvery-green are usually colors that are darker, duller, and less reflective.