Determine the inverse color (white or black) for a given RGB value

rgb-inverse.js

function getRgbInverse(red, green, blue) {

    const rgb = [parseInt(red), parseInt(green), parseInt(blue)]

    let hsp = Math.sqrt(
        0.299 * (rgb[0] * rgb[0]) +
        0.587 * (rgb[1] * rgb[1]) +
        0.114 * (rgb[2] * rgb[2])
    )

    // Determine if text color for background should be light or dark
    if (hsp > 127.5) {
        return [0, 0, 0] // black
    } else {
        return [255, 255, 255] // white
    }
}