colour-2.3.3: A model for human colour/color perception

Safe Haskell Safe Haskell98

Data.Colour.RGBSpace.HSL

Synopsis

# Documentation

data RGB a #

An RGB triple for an unspecified colour space.

Instances

 # Methodsfmap :: (a -> b) -> RGB a -> RGB b #(<\$) :: a -> RGB b -> RGB a # # Methodspure :: a -> RGB a #(<*>) :: RGB (a -> b) -> RGB a -> RGB b #(*>) :: RGB a -> RGB b -> RGB b #(<*) :: RGB a -> RGB b -> RGB a # Eq a => Eq (RGB a) # Methods(==) :: RGB a -> RGB a -> Bool #(/=) :: RGB a -> RGB a -> Bool # Read a => Read (RGB a) # MethodsreadsPrec :: Int -> ReadS (RGB a) #readList :: ReadS [RGB a] #readPrec :: ReadPrec (RGB a) # Show a => Show (RGB a) # MethodsshowsPrec :: Int -> RGB a -> ShowS #show :: RGB a -> String #showList :: [RGB a] -> ShowS #

hslView :: (Fractional a, Ord a) => RGB a -> (a, a, a) #

Returns the HSL (hue-saturation-lightness) coordinates of an RGB triple. See hue, saturation, and lightness.

hue :: (Fractional a, Ord a) => RGB a -> a #

The hue coordinate of an RGB value is in degrees. Its value is always in the range 0-360.

saturation :: (Fractional a, Ord a) => RGB a -> a #

Returns the saturation coordinate of an RGB triple for the HSL (hue-saturation-lightness) system. Note: This is different from saturation for the Data.Colour.RGBSpace.HSV

lightness :: (Fractional a, Ord a) => RGB a -> a #

Returns the lightness coordinate of an RGB triple for the HSL (hue-saturation-lightness) system.

hsl :: (RealFrac a, Ord a) => a -> a -> a -> RGB a #

Convert HSL (hue-saturation-lightness) coordinates to an RGB value. Hue is expected to be measured in degrees.