The hex color #673dba is a dark color. The web-safe version is Hex
#6633CC. A complementary color is
#98C245. The grayscale version is
#757575. A 20% lighter version of the original color is
#9A70ED, and Hex
#340A87 is the 20% darker color. If the color is saturated by 10%, you get
#6637C1. If the color is desaturated by 10%, the color
#6843B3 is obtained.