The hex color #2b757c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D48A83. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#5EA8AF, and Hex
#004249 is the 20% darker color. If the color is saturated by 10%, you get
#26777F. If the color is desaturated by 10%, the color
#307379 is obtained.