The hex color #75718c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#8A8E73. The grayscale version is
#7B7B7B. A 20% lighter version of the original color is
#A8A4BF, and Hex
#423E59 is the 20% darker color. If the color is saturated by 10%, you get
#74708E. If the color is desaturated by 10%, the color
#76728A is obtained.