The hex color #16215c is a dark color. The web-safe version is Hex
#003366. A complementary color is
#E9DEA3. The grayscale version is
#313131. A 20% lighter version of the original color is
#49548F, and Hex
#000029 is the 20% darker color. If the color is saturated by 10%, you get
#131F60. If the color is desaturated by 10%, the color
#192358 is obtained.