The hex color #f6f61b is a light color. The web-safe version is Hex
#FFFF33. A complementary color is
#0909E4. The grayscale version is
#ADADAD. A 20% lighter version of the original color is
#FFFF4E, and Hex
#C3C300 is the 20% darker color. If the color is saturated by 10%, you get
#FDFD0C. If the color is desaturated by 10%, the color
#EFEF2A is obtained.