The hex color #40a69b is a light color. The web-safe version is Hex
#339999. A complementary color is
#BF5964. The grayscale version is
#808080. A 20% lighter version of the original color is
#73D9CE, and Hex
#0D7368 is the 20% darker color. If the color is saturated by 10%, you get
#3AAA9E. If the color is desaturated by 10%, the color
#46A298 is obtained.