The hex color #55aaa0 is a light color. The web-safe version is Hex
#669999. A complementary color is
#AA555F. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#88DDD3, and Hex
#22776D is the 20% darker color. If the color is saturated by 10%, you get
#50ADA2. If the color is desaturated by 10%, the color
#5AA79E is obtained.