The hex color #527c6c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#AD8393. The grayscale version is
#696969. A 20% lighter version of the original color is
#85AF9F, and Hex
#1F4939 is the 20% darker color. If the color is saturated by 10%, you get
#507E6C. If the color is desaturated by 10%, the color
#547A6C is obtained.