getBrightness
RGB color의 밝기 값을 구할 수 있습니다.
Code
services/utils/index.ts
export const getBrightness = (red: number, green: number, blue: number) => {
return (red * 299 + green * 587 + blue * 114) / 1000
}
// Optional
export const isDark = (red: number, green: number, blue: number) => {
return getBrightness(red, green, blue) < 128
}
export const isLight = (red: number, green: number, blue: number) => {
return getBrightness(red, green, blue) >= 128
}