The hex color #5b64a0 is a dark color. The web-safe version is Hex
#666699. A complementary color is
#A49B5F. The grayscale version is
#757575. A 20% lighter version of the original color is
#8E97D3, and Hex
#28316D is the 20% darker color. If the color is saturated by 10%, you get
#5862A4. If the color is desaturated by 10%, the color
#5E669C is obtained.