The hex color #404FD3 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#BFB02C. The grayscale version is
#767676. A 20% lighter version of the original color is
#7382FF, and Hex
#0D1CA0 is the 20% darker color. If the color is saturated by 10%, you get
#3B4BDC. If the color is desaturated by 10%, the color
#4553CA is obtained.