The hex color #404bd3 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#BFB42C. The grayscale version is
#757575. A 20% lighter version of the original color is
#737EFF, and Hex
#0D18A0 is the 20% darker color. If the color is saturated by 10%, you get
#3B47DC. If the color is desaturated by 10%, the color
#454FCA is obtained.