The hex color #3e8da2 is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C1725D. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#71C0D5, and Hex
#0B5A6F is the 20% darker color. If the color is saturated by 10%, you get
#388FA6. If the color is desaturated by 10%, the color
#448B9E is obtained.