The hex color #6b83d5 is a light color. The web-safe version is Hex
#6699CC. A complementary color is
#947C2A. The grayscale version is
#969696. A 20% lighter version of the original color is
#9EB6FF, and Hex
#3850A2 is the 20% darker color. If the color is saturated by 10%, you get
#6781DB. If the color is desaturated by 10%, the color
#6F85CF is obtained.