js rgba to hex

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showing results for - "js rgba to hex"
Alejandra
03 Jan 2017
1function rgbToHex(r, g, b) {
2  return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
3}
4
5function hexToRgb(hex) {
6  var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
7  if(result){
8      var r= parseInt(result[1], 16);
9      var g= parseInt(result[2], 16);
10      var b= parseInt(result[3], 16);
11      return r+","+g+","+b;//return 23,14,45 -> reformat if needed 
12  } 
13  return null;
14}
15console.log(rgbToHex(10, 54, 120)); //#0a3678
16console.log(hexToRgb("#0a3678"));//"10,54,120"
source
Lisa
25 May 2018
1function hexToRgb(hex) {
2  // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
3  var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
4  hex = hex.replace(shorthandRegex, function(m, r, g, b) {
5    return r + r + g + g + b + b;
6  });
7
8  var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
9  return result ? [
10    parseInt(result[1], 16),
11    parseInt(result[2], 16),
12    parseInt(result[3], 16)
13  ] : null;
14}
15
16alert(hexToRgb("#0033ff").g); // "51";
17alert(hexToRgb("#03f").g); // "51";
source
Juan Martín
20 May 2020
1hexToRGB(hex: string, alpha: string) {
2
3  const r = parseInt(hex.slice(1, 3), 16);
4  const g = parseInt(hex.slice(3, 5), 16);
5  const b = parseInt(hex.slice(5, 7), 16);
6
7  if (alpha) {
8    return `rgba(${r}, ${g}, ${b}, ${alpha})`;
9  } else {
10    return `rgb(${r}, ${g}, ${b})`;
11  }
12}
source
Paulina
12 Apr 2020
1//If you write your own code, remember hex color shortcuts (eg., #fff, #000)
2
3function hexToRgbA(hex){
4    var c;
5    if(/^#([A-Fa-f0-9]{3}){1,2}$/.test(hex)){
6        c= hex.substring(1).split('');
7        if(c.length== 3){
8            c= [c[0], c[0], c[1], c[1], c[2], c[2]];
9        }
10        c= '0x'+c.join('');
11        return 'rgba('+[(c>>16)&255, (c>>8)&255, c&255].join(',')+',1)';
12    }
13    throw new Error('Bad Hex');
14}
15
16hexToRgbA('#fbafff')
17
18/*  returned value: (String)
19rgba(251,175,255,1)
20*/
21
Silvana
02 Aug 2017
1function rgba2hex(rgba) {
2  rgba = rgba.match(
3    /^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i
4  );
5  return rgba && rgba.length === 4
6    ? "#" +
7        ("0" + parseInt(rgba[1], 10).toString(16)).slice(-2) +
8        ("0" + parseInt(rgba[2], 10).toString(16)).slice(-2) +
9        ("0" + parseInt(rgba[3], 10).toString(16)).slice(-2)
10    : "";
11}
12// examples
13console.log(rgba2hex('rgba(240, 240, 240, 0.5)'));
14console.log(rgba2hex('rgba(40, 20, 80, 1.0)'));
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