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The hexadecimal color code #405191 is a medium, muted shade of Blue (known as darkslateblue). In the RGB color model, #405191 is comprised of 64 red, 81 green, and 145 blue. In the HSL color space, which is often used in digital design and color grading, it has a hue of 227 degrees, a saturation of 39%, and a lightness of 41%. This color has an approximate wavelength of 492 nm. The closest web-safe color is often utilized in web design, user interfaces (UI), and vector graphics to create muted Blue atmospheres. Designers searching for Blue 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 #405191.