The hex color #0181dd is a dark color. The web-safe version is Hex
#0099CC. A complementary color is
#FE7E22. The grayscale version is
#757575. A 20% lighter version of the original color is
#34B4FF, and Hex
#004EAA is the 20% darker color. If the color is saturated by 10%, you get
#0082E7. If the color is desaturated by 10%, the color
#0D80D3 is obtained.