export declare const fromHSLA: (c: HSLA) => RGBA

export declare const fromXYZ: ({ x, y, z }: XYZ) => RGBA

export declare const rgb: (r: number, g: number, b: number) => RGBA

export declare const rgba: (r: number, g: number, b: number, a: number) => RGBA

export declare const toCSS: (c: RGBA) => string

export declare const Eq: Equals.Eq<RGBA>

export declare const Show: Sh.Show<RGBA>

export interface Normalized {
  /**
   * A number between `0` and `1` representing the red channel of the color
   */
  readonly r: UnitInterval

  /**
   * A number between `0` and `1` representing the green channel of the color
   */
  readonly g: UnitInterval

  /**
   * A number between `0` and `1` representing the blue channel of the color
   */
  readonly b: UnitInterval

  /**
   * A number between `0` and `1` representing the opacity or transparency of the color
   * where `0` is fully transparent and `1` is fully opaque.
   */
  readonly a: UnitInterval
}

export interface RGBA {
  /**
   * A number between `0` and `255` representing the red channel of the color
   */
  readonly r: Channel

  /**
   * A number between `0` and `255` representing the green channel of the color
   */
  readonly g: Channel

  /**
   * A number between `0` and `255` representing the blue channel of the color
   */
  readonly b: Channel

  /**
   * A number between `0` and `1` representing the opacity or transparency of the color
   * where `0` is fully transparent and `1` is fully opaque.
   */
  readonly a: number
}

export declare const brightness: (c: Normalized) => number

export declare const chroma: (c: RGBA) => number

export declare const evolve: <
  F extends {
    readonly r: (a: Channel) => number
    readonly g: (a: Channel) => number
    readonly b: (a: Channel) => number
    readonly a: (a: number) => number
  }
>(
  transformations: F
) => (c: RGBA) => RGBA

export declare const luminance: (color: Normalized) => number

export declare const maxChroma: (c: RGBA) => number

export declare const minChroma: (c: RGBA) => number

export declare const mix: (ratio: number) => (a: RGBA) => (b: RGBA) => RGBA