The hex color #2c57a3 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#D3A85C. The grayscale version is
#626262. A 20% lighter version of the original color is
#5F8AD6, and Hex
#002470 is the 20% darker color. If the color is saturated by 10%, you get
#2756AA. If the color is desaturated by 10%, the color
#31589D is obtained.