The hex color #5bb5a1 is a light color. The web-safe version is Hex
#66CC99. A complementary color is
#A44A5E. The grayscale version is
#909090. A 20% lighter version of the original color is
#8EE8D4, and Hex
#28826E is the 20% darker color. If the color is saturated by 10%, you get
#56B9A3. If the color is desaturated by 10%, the color
#60B19F is obtained.