BootstrapAdmin/Bootstrap.Admin/wwwroot/css/login.css

body {
    color: #797979;
    background-color: #f1f2f7;
}

.form-signin-heading {
    margin: 0;
    padding: 20px 15px;
    text-align: center;
    background-color: #41cac0;
    border-radius: 5px 5px 0 0;
    color: #fff;
}

.login-wrap {
    padding: 20px;
}

.login-footer a:last-child {
    float: right;
}

.btn-login {
    background: #f67a6e;
    color: #fff;
    text-transform: uppercase;
    font-weight: 300;
    font-family: 'Open Sans', sans-serif;
    box-shadow: 0 4px #e56b60;
    margin-bottom: 20px;
    outline: none !important;
    margin-top: -8px;
}

    .btn-login:focus {
        box-shadow: 0 4px #e56b60;
    }

.input-group-text {
    background-color: #6bc3f4;
    border-color: #1ca0e9;
}

.form-control {
    border-color: #1ca0e9;
}

.form-check-label {
    color: #333;
}