The hex color #275c6c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D8A393. The grayscale version is
#505050. A 20% lighter version of the original color is
#5A8F9F, and Hex
#002939 is the 20% darker color. If the color is saturated by 10%, you get
#235D6F. If the color is desaturated by 10%, the color
#2B5B69 is obtained.