The hex color #5a636c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#A59C93. The grayscale version is
#636363. A 20% lighter version of the original color is
#8D969F, and Hex
#273039 is the 20% darker color. If the color is saturated by 10%, you get
#59636D. If the color is desaturated by 10%, the color
#5B636B is obtained.