The hex color #717b8c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#8E8473. The grayscale version is
#7D7D7D. A 20% lighter version of the original color is
#A4AEBF, and Hex
#3E4859 is the 20% darker color. If the color is saturated by 10%, you get
#707B8D. If the color is desaturated by 10%, the color
#727B8B is obtained.