The hex color #05204c is a dark color. The web-safe version is Hex
#003333. A complementary color is
#FADFB3. The grayscale version is
#262626. A 20% lighter version of the original color is
#38537F, and Hex
#000019 is the 20% darker color. If the color is saturated by 10%, you get
#021F50. If the color is desaturated by 10%, the color
#082148 is obtained.