The hex color #1f2e3e is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E0D1C1. The grayscale version is
#2E2E2E. A 20% lighter version of the original color is
#526171, and Hex
#00000B is the 20% darker color. If the color is saturated by 10%, you get
#1D2E40. If the color is desaturated by 10%, the color
#212E3C is obtained.