The hex color #d6f55b is a light color. The web-safe version is Hex
#CCFF66. A complementary color is
#290AA4. The grayscale version is
#B7B7B7. A 20% lighter version of the original color is
#FFFF8E, and Hex
#A3C228 is the 20% darker color. If the color is saturated by 10%, you get
#D9FB52. If the color is desaturated by 10%, the color
#D3EF64 is obtained.