The hex color #3d76cb is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C28934. The grayscale version is
#7F7F7F. A 20% lighter version of the original color is
#70A9FE, and Hex
#0A4398 is the 20% darker color. If the color is saturated by 10%, you get
#3675D3. If the color is desaturated by 10%, the color
#4477C3 is obtained.