The hex color #90e40c is a light color. The web-safe version is Hex
#99CC00. A complementary color is
#6F1BF3. The grayscale version is
#808080. A 20% lighter version of the original color is
#C3FF3F, and Hex
#5DB100 is the 20% darker color. If the color is saturated by 10%, you get
#92EE00. If the color is desaturated by 10%, the color
#8EDA18 is obtained.