The hex color #5a767c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#A58983. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#8DA9AF, and Hex
#274349 is the 20% darker color. If the color is saturated by 10%, you get
#58777D. If the color is desaturated by 10%, the color
#5C757B is obtained.