The hex color #3670a4 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C98F5B. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#69A3D7, and Hex
#033D71 is the 20% darker color. If the color is saturated by 10%, you get
#3070A9. If the color is desaturated by 10%, the color
#3C709F is obtained.