The hex color #0291cc is a dark color. The web-safe version is Hex
#0099CC. A complementary color is
#FD6E33. The grayscale version is
#757575. A 20% lighter version of the original color is
#35C4FF, and Hex
#005E99 is the 20% darker color. If the color is saturated by 10%, you get
#0094D5. If the color is desaturated by 10%, the color
#0E8EC3 is obtained.