The hex color #1e664d is a dark color. The web-safe version is Hex
#336666. A complementary color is
#E199B2. The grayscale version is
#464646. A 20% lighter version of the original color is
#519980, and Hex
#00331A is the 20% darker color. If the color is saturated by 10%, you get
#1A694E. If the color is desaturated by 10%, the color
#22634C is obtained.