The hex color #124b51 is a dark color. The web-safe version is Hex
#003366. A complementary color is
#EDB4AE. The grayscale version is
#3A3A3A. A 20% lighter version of the original color is
#457E84, and Hex
#00181E is the 20% darker color. If the color is saturated by 10%, you get
#0E4D53. If the color is desaturated by 10%, the color
#16494F is obtained.