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Change the floating label color of the TextBox

You can change the floating label color of the TextBox for both success and warning validation states by applying the following CSS styles.

    /* For Success state */
    .e-float-input.e-success label.e-float-text,
    .e-float-input.e-success input:focus ~ label.e-float-text,
    .e-float-input.e-success input:valid ~ label.e-float-text {
        color: #22b24b;
    }

    /* For Warning state */
    .e-float-input.e-warning label.e-float-text,
    .e-float-input.e-warning input:focus ~ label.e-float-text,
    .e-float-input.e-warning input:valid ~ label.e-float-text {
        color: #ffca1c;
    }
tagHelper
validation-state.cs
<div class="control-section">
    <div class="control_wrapper accordion-control-section">
        <div class="e-float-input e-input-group e-success">
            <input type='text' required />
            <span class="e-float-line"></span>
            <label class="e-float-text">Success</label>
        </div>
        <div class="e-float-input e-input-group e-warning">
            <input type='text' required />
            <span class="e-float-line"></span>
            <label class="e-float-text">Warning</label>
        </div>
    </div>
</div>

<script>
    ej.base.enableRipple(true);

    // To get the all input fields and its container.

    var inputElement = document.querySelectorAll('.e-input-group .e-input,.e-float-input.e-input-group input');

    // Add 'e-input-focus' class to the input for achive ripple effect when focus on the input field.

    for (var i = 0; i < inputElement.length; i++) {
        inputElement[i].addEventListener('focus', function () {
            var parentElement = this.parentNode;
            if (parentElement.classList.contains('e-input-in-wrap')) {
                parentElement.parentNode.classList.add('e-input-focus');
            } else {
                this.parentNode.classList.add('e-input-focus');
            }
        });
        inputElement[i].addEventListener('blur', function () {
            var parentElement = this.parentNode;
            if (parentElement.classList.contains('e-input-in-wrap')) {
                parentElement.parentNode.classList.remove('e-input-focus');
            } else {
                this.parentNode.classList.remove('e-input-focus');
            }
        });
    }
</script>

<style>
    /* For Success state */
    .e-float-input.e-success label.e-float-text,
    .e-float-input.e-success input:focus ~ label.e-float-text,
    .e-float-input.e-success input:valid ~ label.e-float-text {
        color: #22b24b;
    }

    /* For Warning state */
    .e-float-input.e-warning label.e-float-text,
    .e-float-input.e-warning input:focus ~ label.e-float-text,
    .e-float-input.e-warning input:valid ~ label.e-float-text {
        color: #ffca1c;
    }
</style>
public ActionResult Index()
{
    return View();
}

Output be like the below.

textbox