The hex color #596dcf is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#A69230. The grayscale version is
#878787. A 20% lighter version of the original color is
#8CA0FF, and Hex
#263A9C is the 20% darker color. If the color is saturated by 10%, you get
#546AD6. If the color is desaturated by 10%, the color
#5E70C8 is obtained.