The hex color #686fce is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#979031. The grayscale version is
#8C8C8C. A 20% lighter version of the original color is
#9BA2FF, and Hex
#353C9B is the 20% darker color. If the color is saturated by 10%, you get
#646CD5. If the color is desaturated by 10%, the color
#6C72C7 is obtained.