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The hexadecimal color code #638497 is a medium, muted shade of Cyan (known as slategray). In the RGB color model, #638497 is comprised of 99 red, 132 green, and 151 blue. In the HSL color space, which is often used in digital design and color grading, it has a hue of 202 degrees, a saturation of 21%, and a lightness of 49%. This color has an approximate wavelength of 510 nm. The closest web-safe color is often utilized in web design, user interfaces (UI), and vector graphics to create muted Cyan atmospheres. Designers searching for Cyan 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 #638497.