The hex color #103d3c is a dark color. The web-safe version is Hex
#003333. A complementary color is
#EFC2C3. The grayscale version is
#2E2E2E. A 20% lighter version of the original color is
#43706F, and Hex
#000A09 is the 20% darker color. If the color is saturated by 10%, you get
#0D3F3D. If the color is desaturated by 10%, the color
#133B3B is obtained.