CSS Hex Color: #28ff00

<!DOCTYPE html>
<title>Color Example</title>
<style>
    div {
        padding: 20px;
        margin: 20px;
    }
    .textColor {
        color: #28ff00;
        background-color: white;
    }
    .borderColor {
        border-width: 3px;
        border-style: solid;
        border-color: #28ff00;
    }
    .backgroundColor {
        background-color: #28ff00;
        color: white;
    }
    .backgroundGradient {
        background: linear-gradient(to bottom, white, #28ff00);
        color: white;
    }

.lighterColor {
        background: #68FF4C;
    }
    .darkerColor {
        background: #1CB200;
    }
    .lighterColor > p, 
    .darkerColor > p {
        color: black;
        background: white;
        padding: 3px;
        border-radius: 3px;
        display: inline-block;
    }

</style>
<div class="textColor borderColor">
    <h1>Testing Text in #28ff00</h1>
    <p>This text has been styled with a color of #28ff00.</p>
    <p>The border is also uses #28ff00.</p>
    <p>Try changing the values to see how it affects the output.</p>
    <p>And see this color applied to the <a target="_blank" href="/html/codes/color/color-tester.cfm?hexColor=28ff00">Color Tester</a>.</p>
</div>
<div class="backgroundColor">
    <h1>Testing a background color of #28ff00.</h1>
    <p>This has a background color of #28ff00.</p>
    <p>Try changing the values to see how it affects the output.</p>
</div>
<div class="backgroundGradient">
    <h1>Testing a background gradient.</h1>
    <p>This has a background gradient going between white and #28ff00.</p>
    <p>Try changing the values to see how it affects the output.</p>
</div>

<div class="lighterColor">
    <p>Lighter color: #68FF4C</p>
</div>
<div class="darkerColor">
    <p>Darker color: #1CB200</p>
</div>