The hex color #4d4b6c is a dark color. The web-safe version is Hex
#663366. A complementary color is
#B2B493. The grayscale version is
#575757. A 20% lighter version of the original color is
#807E9F, and Hex
#1A1839 is the 20% darker color. If the color is saturated by 10%, you get
#4C4A6E. If the color is desaturated by 10%, the color
#4E4C6A is obtained.