The hex color #686dfc is a dark color. The web-safe version is Hex
#6666FF. A complementary color is
#979203. The grayscale version is
#9B9B9B. A 20% lighter version of the original color is
#9BA0FF, and Hex
#353AC9 is the 20% darker color. If the color is saturated by 10%, you get
#6368FF. If the color is desaturated by 10%, the color
#6D72F2 is obtained.