The hex color #4d5b6c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#B2A493. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#808E9F, and Hex
#1A2839 is the 20% darker color. If the color is saturated by 10%, you get
#4C5B6E. If the color is desaturated by 10%, the color
#4F5B6A is obtained.