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Language	Haskell98

Data.Colour.RGBSpace.HSL

Synopsis

data RGB a
hslView :: (Fractional a, Ord a) => RGB a -> (a, a, a)
hue :: (Fractional a, Ord a) => RGB a -> a
saturation :: (Fractional a, Ord a) => RGB a -> a
lightness :: (Fractional a, Ord a) => RGB a -> a
hsl :: (RealFrac a, Ord a) => a -> a -> a -> RGB a

Documentation

data RGB a Source #

An RGB triple for an unspecified colour space.

Instances

Instances details

Applicative RGB Source #
Instance details Defined in Data.Colour.RGB Methods pure :: a -> RGB a # (<>) :: RGB (a -> b) -> RGB a -> RGB b # liftA2 :: (a -> b -> c) -> RGB a -> RGB b -> RGB c # (>) :: RGB a -> RGB b -> RGB b # (<*) :: RGB a -> RGB b -> RGB a #
Functor RGB Source #
Instance details Defined in Data.Colour.RGB Methods fmap :: (a -> b) -> RGB a -> RGB b # (<$) :: a -> RGB b -> RGB a #
Read a => Read (RGB a) Source #
Instance details Defined in Data.Colour.RGB Methods readsPrec :: Int -> ReadS (RGB a) # readList :: ReadS [RGB a] # readPrec :: ReadPrec (RGB a) # readListPrec :: ReadPrec [RGB a] #
Show a => Show (RGB a) Source #
Instance details Defined in Data.Colour.RGB Methods showsPrec :: Int -> RGB a -> ShowS # show :: RGB a -> String # showList :: [RGB a] -> ShowS #
Eq a => Eq (RGB a) Source #
Instance details Defined in Data.Colour.RGB Methods (==) :: RGB a -> RGB a -> Bool # (/=) :: RGB a -> RGB a -> Bool #

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

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

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

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 Source #

Returns the saturation coordinate (range [0, 1]) 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 Source #

Returns the lightness coordinate (range [0, 1]) of an RGB triple for the HSL (hue-saturation-lightness) system.

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

Convert HSL (hue-saturation-lightness) coordinates to an RGB value. Hue is expected to be measured in degrees [0,360], while saturation and lightness are expected to be in the closed range [0,1].