The hex color #5bb37f is a light color. The web-safe version is Hex
#66CC66. A complementary color is
#A44C80. The grayscale version is
#848484. A 20% lighter version of the original color is
#8EE6B2, and Hex
#28804C is the 20% darker color. If the color is saturated by 10%, you get
#57B87E. If the color is desaturated by 10%, the color
#5FAE80 is obtained.