Basic Green 1, also known as Brilliant Green, is a triarylmethane dye that provides a vibrant green with a slightly bluish tone. While closely related to Malachite Green, it is often selected for applications where a cleaner, more brilliant shade is desired. It is used for dyeing silk, wool, and leather. In its pure form, this dye also possesses mild antiseptic properties, which leads to its use in certain specialty applications.