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The hexadecimal color code #663F69 is a dark, muted shade of Purple (known as dimgray). In the RGB color model, #663F69 is comprised of 102 red, 63 green, and 105 blue. In the HSL color space, which is often used in digital design and color grading, it has a hue of 296 degrees, a saturation of 25%, and a lightness of 33%. This color has an approximate wavelength of 444 nm. The closest web-safe color is often utilized in web design, user interfaces (UI), and vector graphics to create muted Purple atmospheres. Designers searching for Purple 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 #663F69.