The hex color #1d1f3a is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E2E0C5. The grayscale version is
#272727. A 20% lighter version of the original color is
#50526D, and Hex
#000007 is the 20% darker color. If the color is saturated by 10%, you get
#1C1E3C. If the color is desaturated by 10%, the color
#1E2038 is obtained.