The hex color #190c20 is a dark color. The web-safe version is Hex
#000033. A complementary color is
#E6F3DF. The grayscale version is
#171717. A 20% lighter version of the original color is
#4C3F53, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#190B21. If the color is desaturated by 10%, the color
#190D1F is obtained.