The hex color #3a7dda is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C58225. The grayscale version is
#868686. A 20% lighter version of the original color is
#6DB0FF, and Hex
#074AA7 is the 20% darker color. If the color is saturated by 10%, you get
#327CE2. If the color is desaturated by 10%, the color
#427ED2 is obtained.