The hex color #685cdc is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#97A323. The grayscale version is
#8B8B8B. A 20% lighter version of the original color is
#9B8FFF, and Hex
#3529A9 is the 20% darker color. If the color is saturated by 10%, you get
#6557E4. If the color is desaturated by 10%, the color
#6B61D4 is obtained.