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The hexadecimal color code #66F109 is a medium, intense shade of Green (known as lawngreen). In the RGB color model, #66F109 is comprised of 102 red, 241 green, and 9 blue. In the HSL color space, which is often used in digital design and color grading, it has a hue of 96 degrees, a saturation of 93%, and a lightness of 49%. This color has an approximate wavelength of 583 nm. The closest web-safe color is often utilized in web design, user interfaces (UI), and vector graphics to create intense Green atmospheres. Designers searching for Green color schemes often pair this with its complementary color or use it as an accent against neutral backgrounds. It is commonly used in digital design for backgrounds, typography, and accent elements. When paired with its complementary color in the palette below, it creates a high-contrast visual hierarchy. Engineers can implement this color using the CSS hex code #66F109.