The hex color #2f587f is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D0A780. The grayscale version is
#575757. A 20% lighter version of the original color is
#628BB2, and Hex
#00254C is the 20% darker color. If the color is saturated by 10%, you get
#2B5883. If the color is desaturated by 10%, the color
#33587B is obtained.