The hex color #3e15e8 is a dark color. The web-safe version is Hex
#3300FF. A complementary color is
#C1EA17. The grayscale version is
#696969. A 20% lighter version of the original color is
#7148FF, and Hex
#0B00B5 is the 20% darker color. If the color is saturated by 10%, you get
#3A0DF5. If the color is desaturated by 10%, the color
#421DDB is obtained.