The hex color #fdde2c is a light color. The web-safe version is Hex
#FFCC33. A complementary color is
#0221D3. The grayscale version is
#ADADAD. A 20% lighter version of the original color is
#FFFF5F, and Hex
#CAAB00 is the 20% darker color. If the color is saturated by 10%, you get
#FFE31F. If the color is desaturated by 10%, the color
#F5D939 is obtained.