JSFiddle - React, Tailwind, and code Playground

by JohnFish

HTML

<div class="demo">

<p class="ui-state-default ui-corner-all ui-helper-clearfix" style="padding:4px;">
    <span class="ui-icon ui-icon-pencil" style="float:left; margin:-2px 5px 0 0;"></span>
    Simple Colorpicker
</p>

<div id="red"></div>
<div id="green"></div>
<div id="blue"></div>

<div id="swatch" class="ui-widget-content ui-corner-all"></div>

</div>

CSS

#red, #green, #blue {
        float: left;
        clear: left;
        width: 300px;
        margin: 15px;
    }
    #swatch {
        width: 120px;
        height: 100px;
        margin-top: 18px;
        margin-left: 350px;
        background-image: none;
    }
    #red .ui-slider-range { background: #ef2929; }
    #red .ui-slider-handle { border-color: #ef2929; }
    #green .ui-slider-range { background: #8ae234; }
    #green .ui-slider-handle { border-color: #8ae234; }
    #blue .ui-slider-range { background: #729fcf; }
    #blue .ui-slider-handle { border-color: #729fcf; }
    #demo-frame > div.demo { padding: 10px !important; };

JavaScript

function hexFromRGB(r, g, b) {
        var hex = [
            r.toString( 16 ),
            g.toString( 16 ),
            b.toString( 16 )
        ];
        $.each( hex, function( nr, val ) {
            if ( val.length === 1 ) {
                hex[ nr ] = "0" + val;
            }
        });
        return hex.join( "" ).toUpperCase();
    }
    function refreshSwatch() {
        var red = $( "#red" ).slider( "value" ),
            green = $( "#green" ).slider( "value" ),
            blue = $( "#blue" ).slider( "value" ),
            hex = hexFromRGB( red, green, blue );
        $( "#swatch" ).css( "background-color", "#" + hex );
    }
    $(function() {
        $( "#red, #green, #blue" ).slider({
            orientation: "horizontal",
            range: "min",
            max: 255,
            value: 127,
            slide: refreshSwatch,
            change: refreshSwatch
        });
        $( "#red" ).slider( "value", 255 );
        $( "#green" ).slider( "value", 140 );
        $( "#blue" ).slider( "value", 60 );
    });