The hex color #3d5ca8 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C2A357. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#708FDB, and Hex
#0A2975 is the 20% darker color. If the color is saturated by 10%, you get
#385BAE. If the color is desaturated by 10%, the color
#425EA2 is obtained.