The hex color #3d88b0 is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C2774F. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#70BBE3, and Hex
#0A557D is the 20% darker color. If the color is saturated by 10%, you get
#3789B5. If the color is desaturated by 10%, the color
#4387AB is obtained.