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allc

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A small typescript package for color conversion.

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/** * Calculates the chroma component of LCH from LAB. * The luminance component of LCH is omitted because it is unnecessary for the computation. * * This function is color space invariant. * * @param a The a component of LAB, unbounded. * @param b The b component of LAB, unbounded. * * @returns The chroma component of LCH. * @see https://bottosson.github.io/posts/oklab/#the-oklab-color-space */ export const toLCHCFromLAB = ( a: number, b: number, ) => Math.hypot(a, b); /** * Calculates the hue component of LCH from LAB. * The luminance component of LCH is omitted because it is unnecessary for the computation. * * This function is color space invariant. * * @param a The a component of LAB, unbounded. * @param b The b component of LAB, unbounded. * * @returns The hue component of LCH. * @see https://bottosson.github.io/posts/oklab/#the-oklab-color-space */ export const toLCHHFromLAB = ( a: number, b: number, ) => Math.atan2(b, a);