The hex color #0351cd is a dark color. The web-safe version is Hex
#0066CC. A complementary color is
#FCAE32. The grayscale version is
#606060. A 20% lighter version of the original color is
#3684FF, and Hex
#001E9A is the 20% darker color. If the color is saturated by 10%, you get
#004FD8. If the color is desaturated by 10%, the color
#0C53C2 is obtained.