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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div class="wrapper">
  <div class="container">
    <h1>Color</h1>
    <input id="picker" type="color" value="#ffffff">
  </div>
  <small>Click on the color picker to interact</small>
</div>
            
          
!

CSS

            
              :root {
  --background-color: #ffffff;
  --text-color: #121212;
}
body {
  background: var(--background-color);
}

.wrapper {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  text-align: center;
  & > h1 {
    color: var(--text-color);
    font-size: calc(1vw * 14);
    margin: 0;
  }
  & > input {
    cursor: pointer;
  }
}

small {
  position: absolute;
  bottom: 2em;
  width: 100vw;
  text-align: center;
  font-size: 1em;
  font-family: monospace;
  
}
            
          
!

JS

            
              const picker = document.querySelectorAll('#picker');
const label = document.querySelectorAll('h1');
picker[0].addEventListener('change', (e) => handlePicker(e));

window.onload = () => {
  label[0].innerHTML = 'white';
}

function handlePicker(e){
  let hex = e.target.value;
  document.body.style.setProperty('--background-color', hex);
  var colorName = getColorName(hex.slice(1));
  if (colorName === 'black'){
    document.body.style.setProperty('--text-color', '#ffffff');
  } else {
    document.body.style.setProperty('--text-color', '#121212');
  }
  label[0].innerHTML = colorName;
}

function getColorName(hex){
  let rgb = getRgb(hex);
  let hsl = getHsl(rgb[0],rgb[1],rgb[2]);
  let degree = hsl[0] * 360;
  let hue = lookUpHue(degree);
  let lightness = lookUpLightness(hsl[2]);
  if (lightness === 'black'){
    return 'black';
  } else if (lightness === 'white'){
    return 'white';
  } else {
    return (lightness + ' ' + hue); 
  }
}

function getRgb(hex){
  let rgb = [];
  for (let i = 0; i < 6; i++){
    if (i % 2 === 0){
      rgb.push( parseInt(hex.substr(i,2), 16) );
    }
  }
  return rgb;
}

/**
 * Converts an RGB color value to HSL. Conversion formula
 * adapted from http://en.wikipedia.org/wiki/HSL_color_space.
 * Assumes r, g, and b are contained in the set [0, 255] and
 * returns h, s, and l in the set [0, 1].
 *
 * https://github.com/stonesun/color-conversion-algorithms/blob/master/color-conversion-algorithms.js
 *
 * @param   Number  r       The red color value
 * @param   Number  g       The green color value
 * @param   Number  b       The blue color value
 * @return  Array           The HSL representation
 */
function getHsl(r, g, b){
    r /= 255;
    g /= 255;
    b /= 255;
    const max = Math.max(r, g, b);
    const min = Math.min(r, g, b);
    let h, s, l = (max + min) / 2;
    if(max == min){
        h = s = 0; // achromatic
    }else{
        let d = max - min;
        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
        switch(max){
            case r: h = (g - b) / d + (g < b ? 6 : 0);
            break;
            case g: h = (b - r) / d + 2;
            break;
            case b: h = (r - g) / d + 4;
            break;
        }
        h /= 6;
    }
    return [h, s, l];
}

function lookUpLightness(value){
  switch(true){
    case value === 0:
      return 'black';
    break;
    case value <= .35:
      return 'dark';
    break;
    case value > .35 && value <= .5:
      return '';
    break;
    case value > .5 && value < .9:
      return 'light';
    break;
    case value >= .9:
      return 'white';
    break;
  }
}

function lookUpHue(degree) {
    switch (true) {
        case degree >= 0 && degree < 7:
            return "red";
            break;
        case degree >= 7 && degree < 14:
            return "vermillion";
            break;
        case degree >= 14 && degree < 28:
            return "orange";
            break;
        case degree >= 28 && degree < 42:
            return "amber";
            break;
        case degree >= 42 && degree < 56:
            return "yellow";
            break;
        case degree >= 56 && degree < 70:
            return "lime";
            break;
        case degree >= 70 && degree < 84:
            return "lime";
            break;
        case degree >= 84 && degree < 98:
            return "emerald";
            break;
        case degree >= 98 && degree < 112:
            return "green";
            break;
        case degree >= 112 && degree < 126:
            return "green";
            break;
        case degree >= 126 && degree < 140:
            return "turquoise";
            break;
        case degree >= 140 && degree < 154:
            return "turquoise";
            break;
        case degree >= 154 && degree < 168:
            return "cyan";
            break;
        case degree >= 168 && degree < 182:
            return "sky";
            break;
        case degree >= 182 && degree < 196:
            return "cobalt";
            break;
        case degree >= 196 && degree < 210:
            return "ultramarine";
            break;
        case degree >= 210 && degree < 224:
            return "blue";
            break;
        case degree >= 224 && degree < 238:
            return "blue";
            break;
        case degree >= 238 && degree < 252:
            return "violet";
            break;
        case degree >= 252 && degree < 266:
            return "violet";
            break;
        case degree >= 266 && degree < 280:
            return "purple";
            break;
        case degree >= 280 && degree < 294:
            return "magenta";
            break;
        case degree >= 294 && degree < 308:
            return "lavender";
            break;
        case degree >= 308 && degree < 322:
            return "pink";
            break;
        case degree >= 322 && degree < 336:
            return "pink";
            break;
        case degree >= 336 && degree < 350:
            return "red";
            break;
        case degree >= 350 && degree < 360:
            return "red";
            break;
    }
}
            
          
!
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