JSFiddle - React, Tailwind, and code Playground
HTML
<a href="javascript:var colors = { 1:'#F7977A',2:'#FDC68A',3:'#FFF79A',4:'#A2D39C',5:'#7BCDC8',6:'#7EA7D8',7:'#8882BE',8:'#B4A798',9:'#F6989D',10:'#C7B299',11:'#736357',12:'#A67C52',13:'#754C24',14:'#59955C',15:'#75B4FF',16:'#2F74D0',17:'#8CD1E6',18:'#C79BF2',19:'#FFA4FF',20:'#336666',21:'#333366',22:'#336666',23:'#528413',24:'#999999'}; var items = document.querySelectorAll("[class^='span']"); for (var i = items.length; i--;) { var match = items[i].className.match(/.*(span\d+)+/gi); if (!match) continue; var num = match[0].replace('span', ''); items[i].style.backgroundColor = (colors[num]) ? colors[num] : 'red'; items[i].innerHTML = '<span style="color: #fff; text-shadow: 1px 1px 2px rgba(0,0,0,0.7); font-size: 14px;"> span' + num + '</span>' + items[i].innerHTML;} void(0);" id="bookmarklet">Show Twitter Bootstrap columns</a>
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CSS
body {font-family:Arial;}
#bookmarklet {
display:block;
font-size:1.4em;
padding:6px;
background-color:#AAFFAA;
border:3px solid #00AA00;
font-weight:bold;
color:#00AA00;
width:365px;
text-align:center;
}