21 lines
588 B
TypeScript
21 lines
588 B
TypeScript
export const hexToRgb = (hex: string): [r: number, g: number, b: number] => {
|
|
const shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i
|
|
hex = hex.replace(shorthandRegex, (_m, r, g, b) => {
|
|
return r + r + g + g + b + b
|
|
})
|
|
|
|
const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)
|
|
return result
|
|
? [
|
|
parseInt(result[1], 16),
|
|
parseInt(result[2], 16),
|
|
parseInt(result[3], 16),
|
|
]
|
|
: [0, 0, 0]
|
|
}
|
|
|
|
export const isLight = (hexColor: string) =>
|
|
(([r, g, b]) => (r * 299 + g * 587 + b * 114) / 1000 > 155)(
|
|
hexToRgb(hexColor)
|
|
)
|