The hex color #3b70a7 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C48F58. The grayscale version is
#717171. A 20% lighter version of the original color is
#6EA3DA, and Hex
#083D74 is the 20% darker color. If the color is saturated by 10%, you get
#3670AC. If the color is desaturated by 10%, the color
#4070A2 is obtained.