The hex color #554db2 is a dark color. The web-safe version is Hex
#666699. A complementary color is
#AAB24D. The grayscale version is
#717171. A 20% lighter version of the original color is
#8880E5, and Hex
#221A7F is the 20% darker color. If the color is saturated by 10%, you get
#5249B8. If the color is desaturated by 10%, the color
#5851AC is obtained.