The hex color #4d748c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#B28B73. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#80A7BF, and Hex
#1A4159 is the 20% darker color. If the color is saturated by 10%, you get
#4A758F. If the color is desaturated by 10%, the color
#507489 is obtained.