The hex color #0f81d3 is a dark color. The web-safe version is Hex
#0099CC. A complementary color is
#F07E2C. The grayscale version is
#767676. A 20% lighter version of the original color is
#42B4FF, and Hex
#004EA0 is the 20% darker color. If the color is saturated by 10%, you get
#0582DC. If the color is desaturated by 10%, the color
#1980CA is obtained.