The hex color #3e858f is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C17A70. The grayscale version is
#717171. A 20% lighter version of the original color is
#71B8C2, and Hex
#0B525C is the 20% darker color. If the color is saturated by 10%, you get
#398792. If the color is desaturated by 10%, the color
#43838C is obtained.