The hex color #3a75a9 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C58A56. The grayscale version is
#737373. A 20% lighter version of the original color is
#6DA8DC, and Hex
#074276 is the 20% darker color. If the color is saturated by 10%, you get
#3475AE. If the color is desaturated by 10%, the color
#4075A4 is obtained.