The hex color #376b9f is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C89460. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#6A9ED2, and Hex
#04386C is the 20% darker color. If the color is saturated by 10%, you get
#326BA4. If the color is desaturated by 10%, the color
#3C6B9A is obtained.