The hex color #3604ef is a dark color. The web-safe version is Hex
#3300FF. A complementary color is
#C9FB10. The grayscale version is
#636363. A 20% lighter version of the original color is
#6937FF, and Hex
#0300BC is the 20% darker color. If the color is saturated by 10%, you get
#3200FD. If the color is desaturated by 10%, the color
#3B0EE1 is obtained.