The hex color #5b9f55 is a light color. The web-safe version is Hex
#669966. A complementary color is
#A460AA. The grayscale version is
#707070. A 20% lighter version of the original color is
#8ED288, and Hex
#286C22 is the 20% darker color. If the color is saturated by 10%, you get
#59A452. If the color is desaturated by 10%, the color
#5D9A58 is obtained.