Data.Color.Util

Functions for manipulating colors.

Types

data RGB

A color triplet of red, green, and blue intensity.

Constructors

RGB

Fields

• red :: !Word8
• green :: !Word8
• blue :: !Word8

Instances

Eq RGB

Methods

(==) :: RGB -> RGB -> Bool

(/=) :: RGB -> RGB -> Bool

Ord RGB

Methods

compare :: RGB -> RGB -> Ordering

(<) :: RGB -> RGB -> Bool

(<=) :: RGB -> RGB -> Bool

(>) :: RGB -> RGB -> Bool

(>=) :: RGB -> RGB -> Bool

max :: RGB -> RGB -> RGB

min :: RGB -> RGB -> RGB

Read RGB

Methods

readsPrec :: Int -> ReadS RGB

readList :: ReadS [RGB]

readPrec :: ReadPrec RGB

readListPrec :: ReadPrec [RGB]

Show RGB

Methods

showsPrec :: Int -> RGB -> ShowS

show :: RGB -> String

showList :: [RGB] -> ShowS

Generic RGB

Associated Types

type Rep RGB :: * -> *

Methods

from :: RGB -> Rep RGB x

to :: Rep RGB x -> RGB

type Rep RGB

type Rep RGB = D1 (MetaData "RGB" "Data.Color.Util" "raft-0.3.7.0-5padTAlBxxMFRzFEx1bDJW" False) (C1 (MetaCons "RGB" PrefixI True) ((:*:) (S1 (MetaSel (Just Symbol "red") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Word8)) ((:*:) (S1 (MetaSel (Just Symbol "green") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Word8)) (S1 (MetaSel (Just Symbol "blue") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Word8)))))

Functions

hsvToRgb :: (Double, Double, Double) -> RGB

Convert a hue, saturation, value triplet to a red, green, blue one. Source: http://www.cs.rit.edu/~ncs/color/t_convert.html.

rgbToHsv :: RGB -> (Double, Double, Double)

Convert a red, green, blue triplet to a hue, saturation, value one. Source: http://www.cs.rit.edu/~ncs/color/t_convert.html.

byteColor

Arguments

:: Double

The color intensity, in the range [0, 1].

-> Word8

The color intensity, in the range [0, 255].

Scale a colour to a byte.