# convert Hsl to rgb and hex

New approach (inspired by @Kamil-Kiełczewski solution)
Takes `degree, percentage, percentage` and returns css `hex` color:

```function hslToHex(h, s, l) {
l /= 100;
const a = s * Math.min(l, 1 - l) / 100;
const f = n => {
const k = (n + h / 30) % 12;
const color = l - a * Math.max(Math.min(k - 3, 9 - k, 1), -1);
return Math.round(255 * color).toString(16).padStart(2, '0');   // convert to Hex and prefix "0" if needed
};
return `#\${f(0)}\${f(8)}\${f(4)}`;
}
```

Example:

```hslToHex(360, 100, 50)  // "#ff0000" -> red
```

## Original version: (still OK, just longer)

Takes `degree, percentage, percentage` and returns css `hex` color:

```function hslToHex(h, s, l) {
h /= 360;
s /= 100;
l /= 100;
let r, g, b;
if (s === 0) {
r = g = b = l; // achromatic
} else {
const hue2rgb = (p, q, t) => {
if (t < 0) t += 1;
if (t > 1) t -= 1;
if (t < 1 / 6) return p + (q - p) * 6 * t;
if (t < 1 / 2) return q;
if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
return p;
};
const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
const p = 2 * l - q;
r = hue2rgb(p, q, h + 1 / 3);
g = hue2rgb(p, q, h);
b = hue2rgb(p, q, h - 1 / 3);
}
const toHex = x => {
const hex = Math.round(x * 255).toString(16);
return hex.length === 1 ? '0' + hex : hex;
};
return `#\${toHex(r)}\${toHex(g)}\${toHex(b)}`;
}
```

Example:

`hslToHex(360, 100, 50)  // "#ff0000" -> red`