The hex color #3a707c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#C58F83. The grayscale version is
#626262. A 20% lighter version of the original color is
#6DA3AF, and Hex
#073D49 is the 20% darker color. If the color is saturated by 10%, you get
#36717F. If the color is desaturated by 10%, the color
#3E6F79 is obtained.