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External module "hsluv"

Index

Variables

Functions

Variables

Const epsilon

epsilon: number = 0.0088564516

Const hexChars

hexChars: String = "0123456789abcdef"

Const kappa

kappa: number = 903.2962962

Const m

m: number[][] = [[ 3.240969941904521, -1.537383177570093, -0.498610760293 ],[ -0.96924363628087, 1.87596750150772, 0.041555057407175 ],[ 0.055630079696993, -0.20397695888897, 1.056971514242878 ]]

Const minv

minv: number[][] = [[ 0.41239079926595, 0.35758433938387, 0.18048078840183 ],[ 0.21263900587151, 0.71516867876775, 0.072192315360733 ],[ 0.019330818715591, 0.11919477979462, 0.95053215224966 ]]

Const refU

refU: number = 0.19783000664283

Const refV

refV: number = 0.46831999493879

Const refY

refY: number = 1

Functions

Const dot_product

  • dot_product(a: number[], b: number[]): number

  • Parameters

    • a: number[]
    • b: number[]

    Returns number

Const from_linear

  • from_linear(c: number): number

  • Parameters

    • c: number

    Returns number

Const get_bounds

  • get_bounds(L: number): line[]

  • For a given lightness, return a list of 6 lines in slope-intercept form that represent the bounds in CIELUV, stepping over which will push a value out of the RGB gamut

    Parameters

    • L: number

    Returns line[]

Const hex_to_hpluv

  • hex_to_hpluv(s: string): hpl

  • HSLuv values are ranging in [0;360], [0;100] and [0;100] and RGB in [0;1].

    Parameters

    • s: string

    Returns hpl

    An array containing the color's HSL values in HPLuv (pastel variant) color space.

Const hex_to_hsluv

  • hex_to_hsluv(s: string): hsl

  • HSLuv values are ranging in [0;360], [0;100] and [0;100] and RGB in [0;1].

    Parameters

    • s: string

    Returns hsl

    An array containing the color's HSL values in HSLuv color space.

Const hex_to_rgb

  • hex_to_rgb(uhex: string): rgb

  • RGB values are ranging in [0;1].

    Parameters

    • uhex: string

    Returns rgb

    An array containing the color's RGB values.

Const hpluv_to_hex

  • hpluv_to_hex(tuple: hpl): string

Const hpluv_to_lch

  • hpluv_to_lch(tuple: hpl): lch

  • HSLuv values are in [0;360], [0;100] and [0;100].

    Parameters

    • tuple: hpl

      An array containing the color's H,S,L values in HPLuv (pastel variant) color space.

    Returns lch

    An array containing the resulting color's LCH coordinates.

Const hpluv_to_rgb

  • hpluv_to_rgb(tuple: hpl): rgb

  • HSLuv values are ranging in [0;360], [0;100] and [0;100] and RGB in [0;1].

    Parameters

    • tuple: hpl

      An array containing the color's HSL values in HPLuv (pastel variant) color space.

    Returns rgb

    An array containing the resulting color's RGB coordinates.

Const hsluv_to_hex

  • hsluv_to_hex(tuple: hsl): string

  • HSLuv values are ranging in [0;360], [0;100] and [0;100] and RGB in [0;1].

    Parameters

    • tuple: hsl

      An array containing the color's HSL values in HSLuv color space.

    Returns string

    A string containing a #RRGGBB representation of given color.

Const hsluv_to_lch

  • hsluv_to_lch(tuple: hsl): lch

  • HSLuv values are ranging in [0;360], [0;100] and [0;100].

    Parameters

    • tuple: hsl

      An array containing the color's H,S,L values in HSLuv color space.

    Returns lch

    An array containing the resulting color's LCH coordinates.

Const hsluv_to_rgb

  • hsluv_to_rgb(tuple: hsl): rgb

  • HSLuv values are ranging in [0;360], [0;100] and [0;100] and RGB in [0;1].

    Parameters

    • tuple: hsl

      An array containing the color's HSL values in HSLuv color space.

    Returns rgb

    An array containing the resulting color's RGB coordinates.

Const l_to_y

  • l_to_y(L: number): number

  • Parameters

    • L: number

    Returns number

Const lch_to_hpluv

  • lch_to_hpluv(tuple: lch): hpl

  • HSLuv values are ranging in [0;360], [0;100] and [0;100].

    Parameters

    • tuple: lch

      An array containing the color's LCH values.

    Returns hpl

    An array containing the resulting color's HSL coordinates in HPLuv (pastel variant) color space.

Const lch_to_hsluv

  • lch_to_hsluv(tuple: lch): hsl

  • HSLuv values are ranging in [0;360], [0;100] and [0;100].

    Parameters

    • tuple: lch

      An array containing the color's LCH values.

    Returns hsl

    An array containing the resulting color's HSL coordinates in HSLuv color space.

Const lch_to_luv

  • Parameters

    • tuple: lch

      An array containing the color's L,C,H values.

    Returns luv

    An array containing the resulting color's LUV coordinates.

Const lch_to_rgb

  • RGB values are ranging in [0;1].

    Parameters

    • tuple: lch

      An array containing the color's LCH values.

    Returns rgb

    An array containing the resulting color's RGB coordinates.

Const luv_to_lch

  • Parameters

    • tuple: luv

      An array containing the color's L,U,V values.

    Returns lch

    An array containing the resulting color's LCH coordinates.

Const luv_to_xyz

  • XYZ coordinates are ranging in [0;1].

    Parameters

    • tuple: luv

      An array containing the color's L,U,V values.

    Returns xyz

    An array containing the resulting color's XYZ coordinates.

Const max_chroma_for_lh

  • max_chroma_for_lh(L: number, H: number): number

  • Parameters

    • L: number
    • H: number

    Returns number

Const max_safe_chroma_for_l

  • max_safe_chroma_for_l(L: number): number

  • For given lightness, returns the maximum chroma. Keeping the chroma value below this number will ensure that for any hue, the color is within the RGB gamut.

    Parameters

    • L: number

    Returns number

Const rgb_to_hex

  • rgb_to_hex(tuple: rgb): string

  • RGB values are ranging in [0;1].

    Parameters

    • tuple: rgb

      An array containing the color's RGB values.

    Returns string

    A string containing a #RRGGBB representation of given color.

Const rgb_to_hpluv

  • rgb_to_hpluv(tuple: rgb): hpl

  • HSLuv values are ranging in [0;360], [0;100] and [0;100] and RGB in [0;1].

    Parameters

    • tuple: rgb

      An array containing the color's RGB coordinates.

    Returns hpl

    An array containing the resulting color's HSL coordinates in HPLuv (pastel variant) color space.

Const rgb_to_hsluv

  • rgb_to_hsluv(tuple: rgb): hsl

  • HSLuv values are ranging in [0;360], [0;100] and [0;100] and RGB in [0;1].

    Parameters

    • tuple: rgb

      An array containing the color's RGB coordinates.

    Returns hsl

    An array containing the resulting color's HSL coordinates in HSLuv color space.

Const rgb_to_lch

  • RGB values are ranging in [0;1].

    Parameters

    • tuple: rgb

      An array containing the color's RGB values.

    Returns lch

    An array containing the resulting color's LCH coordinates.

Const rgb_to_xyz

  • RGB coordinates are ranging in [0;1] and XYZ coordinates in [0;1].

    Parameters

    • tuple: rgb

      An array containing the color's R,G,B values.

    Returns xyz

    An array containing the resulting color's XYZ coordinates.

Const to_linear

  • to_linear(c: number): number

  • Parameters

    • c: number

    Returns number

Const xyz_to_luv

  • XYZ coordinates are ranging in [0;1].

    Parameters

    • tuple: xyz

      An array containing the color's X,Y,Z values.

    Returns luv

    An array containing the resulting color's LUV coordinates.

Const xyz_to_rgb

  • XYZ coordinates are ranging in [0;1] and RGB coordinates in [0;1] range.

    Parameters

    • tuple: xyz

      An array containing the color's X,Y and Z values.

    Returns rgb

    An array containing the resulting color's red, green and blue.

Const y_to_l

  • y_to_l(Y: number): number

  • http://en.wikipedia.org/wiki/CIELUV

    In these formulas, Yn refers to the reference white point. We are using illuminant D65, so Yn (see refY in Maxima file) equals 1. The formula is simplified accordingly.

    Parameters

    • Y: number

    Returns number

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