The hex color #031dcc is a dark color. The web-safe version is Hex
#0033CC. A complementary color is
#FCE233. The grayscale version is
#4F4F4F. A 20% lighter version of the original color is
#3650FF, and Hex
#000099 is the 20% darker color. If the color is saturated by 10%, you get
#0018D9. If the color is desaturated by 10%, the color
#0B22BF is obtained.