The hex color #2a757c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D58A83. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#5DA8AF, and Hex
#004249 is the 20% darker color. If the color is saturated by 10%, you get
#25777F. If the color is desaturated by 10%, the color
#2F7379 is obtained.