The hex color #604BAB is a dark color. The web-safe version is Hex
#663399. A complementary color is
#9FB454. The grayscale version is
#727272. A 20% lighter version of the original color is
#937EDE, and Hex
#2D1878 is the 20% darker color. If the color is saturated by 10%, you get
#5E47B1. If the color is desaturated by 10%, the color
#624FA5 is obtained.