Safe Haskell	Safe
Language	Haskell98

Data.Colour.RGBSpace.HSL

Synopsis

Documentation

data RGB a #

An RGB triple for an unspecified colour space.

Instances

Functor RGB #
Methods fmap :: (a -> b) -> RGB a -> RGB b # (<$) :: a -> RGB b -> RGB a #
Applicative RGB #
Methods pure :: 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) #
Methods readsPrec :: Int -> ReadS (RGB a) # readList :: ReadS [RGB a] # readPrec :: ReadPrec (RGB a) # readListPrec :: ReadPrec [RGB a] #
Show a => Show (RGB a) #
Methods showsPrec :: 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.