The hex color #0a535c is a dark color. The web-safe version is Hex
#006666. A complementary color is
#F5ACA3. The grayscale version is
#3E3E3E. A 20% lighter version of the original color is
#3D868F, and Hex
#002029 is the 20% darker color. If the color is saturated by 10%, you get
#05555F. If the color is desaturated by 10%, the color
#0F5159 is obtained.