The hex color #3e7ea3 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C1815C. The grayscale version is
#757575. A 20% lighter version of the original color is
#71B1D6, and Hex
#0B4B70 is the 20% darker color. If the color is saturated by 10%, you get
#397FA8. If the color is desaturated by 10%, the color
#447D9E is obtained.