The hex color #a7ea19 is a light color. The web-safe version is Hex
#99FF00. A complementary color is
#5815E6. The grayscale version is
#8E8E8E. A 20% lighter version of the original color is
#DAFF4C, and Hex
#74B700 is the 20% darker color. If the color is saturated by 10%, you get
#AAF30D. If the color is desaturated by 10%, the color
#A5E125 is obtained.