The hex color #cfd357 is a light color. The web-safe version is Hex
#CCCC66. A complementary color is
#302CA8. The grayscale version is
#A8A8A8. A 20% lighter version of the original color is
#FFFF8A, and Hex
#9CA024 is the 20% darker color. If the color is saturated by 10%, you get
#D3D74F. If the color is desaturated by 10%, the color
#CBCF5F is obtained.