The hex color #0c66cc is a dark color. The web-safe version is Hex
#0066CC. A complementary color is
#F39933. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#3F99FF, and Hex
#003399 is the 20% darker color. If the color is saturated by 10%, you get
#0366D6. If the color is desaturated by 10%, the color
#1566C2 is obtained.