The hex color #10195c is a dark color. The web-safe version is Hex
#000066. A complementary color is
#EFE6A3. The grayscale version is
#2C2C2C. A 20% lighter version of the original color is
#434C8F, and Hex
#000029 is the 20% darker color. If the color is saturated by 10%, you get
#0D1761. If the color is desaturated by 10%, the color
#131B57 is obtained.