The hex color #3d68d2 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C2972D. The grayscale version is
#7D7D7D. A 20% lighter version of the original color is
#709BFF, and Hex
#0A359F is the 20% darker color. If the color is saturated by 10%, you get
#3766DB. If the color is desaturated by 10%, the color
#436ACA is obtained.