function rgb2hex(sRGB) {
    let str = '#'
    var temp
    sRGB.slice(4, -1).split(',').forEach((value) => {
        temp = parseInt(value.trim()).toString(16)
        str += temp.length == 1 ? '0' + temp : temp
    })
    if (str === '#NaN') return sRGB
    return str
}