The hex color #3604b0 is a dark color. The web-safe version is Hex
#330099. A complementary color is
#C9FB4F. The grayscale version is
#4E4E4E. A 20% lighter version of the original color is
#6937E3, and Hex
#03007D is the 20% darker color. If the color is saturated by 10%, you get
#3400BA. If the color is desaturated by 10%, the color
#380BA6 is obtained.