The hex color #818dbc is a light color. The web-safe version is Hex
#9999CC. A complementary color is
#7E7243. The grayscale version is
#999999. A 20% lighter version of the original color is
#B4C0EF, and Hex
#4E5A89 is the 20% darker color. If the color is saturated by 10%, you get
#7F8CC0. If the color is desaturated by 10%, the color
#838EB8 is obtained.