The hex color #231DF0 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#DCE20F. The grayscale version is
#656565. A 20% lighter version of the original color is
#5650FF, and Hex
#0000BD is the 20% darker color. If the color is saturated by 10%, you get
#1C16FE. If the color is desaturated by 10%, the color
#2A24E2 is obtained.