The hex color #4038d0 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#BFC72F. The grayscale version is
#6D6D6D. A 20% lighter version of the original color is
#736BFF, and Hex
#0D059D is the 20% darker color. If the color is saturated by 10%, you get
#3B33DA. If the color is desaturated by 10%, the color
#453DC6 is obtained.