The hex color #3e858e is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C17A71. The grayscale version is
#707070. A 20% lighter version of the original color is
#71B8C1, and Hex
#0B525B is the 20% darker color. If the color is saturated by 10%, you get
#398791. If the color is desaturated by 10%, the color
#43838B is obtained.