The hex color #4b57a8 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#B4A857. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#7E8ADB, and Hex
#182475 is the 20% darker color. If the color is saturated by 10%, you get
#4855AE. If the color is desaturated by 10%, the color
#4F59A2 is obtained.