The hex color #425f9c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#BDA063. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#7592CF, and Hex
#0F2C69 is the 20% darker color. If the color is saturated by 10%, you get
#3E5EA1. If the color is desaturated by 10%, the color
#466097 is obtained.