The hex color #3b738f is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C48C70. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#6EA6C2, and Hex
#08405C is the 20% darker color. If the color is saturated by 10%, you get
#367493. If the color is desaturated by 10%, the color
#40728B is obtained.