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
Applicative RGB
Eq a => Eq (RGB a)
Read a => Read (RGB a)
Show a => Show (RGB a)

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.