The hex color #3790cc is a dark color. The web-safe version is Hex
#3399CC. A complementary color is
#C86F33. The grayscale version is
#868686. A 20% lighter version of the original color is
#6AC3FF, and Hex
#045D99 is the 20% darker color. If the color is saturated by 10%, you get
#2F91D3. If the color is desaturated by 10%, the color
#3F8FC5 is obtained.