44 lines
874 B
TypeScript
44 lines
874 B
TypeScript
import { getRgbValue } from '@jiaminghi/color'
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function rgb2hsl([r, g, b]: number[]): [h:number, s:string, l:string] {
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r = r / 255 // [0, 1]
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g = g / 255 // [0, 1]
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b = b / 255 // [0, 1]
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const max = Math.max(r, g, b)
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const min = Math.min(r, g, b)
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const d = max - min
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const l = (max + min) / 2
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const s = d === 0 ? 0 : l > 0.5 ? d / (2 - 2 * l) : d / (2 * l)
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let h = 0
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if (d !== 0) {
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switch (max) {
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case r:
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h = (g - b) / d + (g < b ? 6 : 0)
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break
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case g:
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h = (b - r) / d + 2
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break
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case b:
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h = (r - g) / d + 4
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break
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default:
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break
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}
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h = h / 6
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}
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return [h * 360, `${s * 100}%`, `${l * 100}%`]
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}
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function hex2hsl(hex: string): [h:number, s:string, l:string] {
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const [r, g, b] = getRgbValue(hex)
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return rgb2hsl([r, g, b])
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}
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export {
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rgb2hsl, hex2hsl,
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}
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