The hex color #cde90b is a light color. The web-safe version is Hex
#CCFF00. A complementary color is
#3216F4. The grayscale version is
#969696. A 20% lighter version of the original color is
#FFFF3E, and Hex
#9AB600 is the 20% darker color. If the color is saturated by 10%, you get
#D3F100. If the color is desaturated by 10%, the color
#C7E119 is obtained.