The hex color #3F94A8 is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C06B57. The grayscale version is
#7E7E7E. A 20% lighter version of the original color is
#72C7DB, and Hex
#0C6175 is the 20% darker color. If the color is saturated by 10%, you get
#3996AC. If the color is desaturated by 10%, the color
#4592A4 is obtained.