The hex color #3d485d is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C2B7A2. The grayscale version is
#4B4B4B. A 20% lighter version of the original color is
#707B90, and Hex
#0A152A is the 20% darker color. If the color is saturated by 10%, you get
#3C485F. If the color is desaturated by 10%, the color
#3E485B is obtained.