The hex color #2f3fd0 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#D0C02F. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#6272FF, and Hex
#000C9D is the 20% darker color. If the color is saturated by 10%, you get
#293BDA. If the color is desaturated by 10%, the color
#3543C6 is obtained.