/* 20211022004420 - v2 */
.gui,
.gui-block-linklist li a {
  color: #666666;
}

.gui-page-title,
.gui a.gui-bold,
.gui-block-subtitle,
.gui-table thead tr th,
.gui ul.gui-products li .gui-products-title a,
.gui-form label,
.gui-block-title.gui-dark strong,
.gui-block-title.gui-dark strong a,
.gui-content-subtitle {
  color: #000000;
}

.gui-block-inner strong {
  color: #848484;
}

.gui a {
  color: #2c81ff;
}

.gui-input.gui-focus,
.gui-text.gui-focus,
.gui-select.gui-focus {
  border-color: #2c81ff;
  box-shadow: 0 0 2px #2c81ff;
}

.gui-select.gui-focus .gui-handle {
  border-color: #2c81ff;
}

.gui-block,
.gui-block-title,
.gui-buttons.gui-border,
.gui-block-inner,
.gui-image {
  border-color: #8d8d8d;
}

.gui-block-title {
  color: #333333;
  background-color: #ffffff;
}

.gui-content-title {
  color: #333333;
}

.gui-form .gui-field .gui-description span {
  color: #666666;
}

.gui-block-inner {
  background-color: #f4f4f4;
}

.gui-block-option {
  border-color: #ededed;
  background-color: #f9f9f9;
}

.gui-block-option-block {
  border-color: #ededed;
}

.gui-block-title strong {
  color: #333333;
}

.gui-line,
.gui-cart-sum .gui-line {
  background-color: #cbcbcb;
}

.gui ul.gui-products li {
  border-color: #dcdcdc;
}

.gui-block-subcontent,
.gui-content-subtitle {
  border-color: #dcdcdc;
}

.gui-faq,
.gui-login,
.gui-password,
.gui-register,
.gui-review,
.gui-sitemap,
.gui-block-linklist li,
.gui-table {
  border-color: #dcdcdc;
}

.gui-block-content .gui-table {
  border-color: #ededed;
}

.gui-table thead tr th {
  border-color: #cbcbcb;
  background-color: #f9f9f9;
}

.gui-table tbody tr td {
  border-color: #ededed;
}

.gui a.gui-button-large,
.gui a.gui-button-small {
  border-color: #8d8d8d;
  color: #000000;
  background-color: #ffffff;
}

.gui a.gui-button-large.gui-button-action,
.gui a.gui-button-small.gui-button-action {
  border-color: #8d8d8d;
  color: #000000;
  background-color: #ffffff;
}

.gui a.gui-button-large:active,
.gui a.gui-button-small:active {
  background-color: #cccccc;
  border-color: #707070;
}

.gui a.gui-button-large.gui-button-action:active,
.gui a.gui-button-small.gui-button-action:active {
  background-color: #cccccc;
  border-color: #707070;
}

.gui-input,
.gui-text,
.gui-select,
.gui-number {
  border-color: #8d8d8d;
  background-color: #ffffff;
}

.gui-select .gui-handle,
.gui-number .gui-handle {
  border-color: #8d8d8d;
}

.gui-number .gui-handle a {
  background-color: #ffffff;
}

.gui-input input,
.gui-number input,
.gui-text textarea,
.gui-select .gui-value {
  color: #000000;
}

.gui-progressbar {
  background-color: #f7281e;
}

/* custom */
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
#mySidenav a {
  position: absolute;
  left: -80px;
  transition: 0.3s;
  padding: 15px;
  width: 100px;
  text-decoration: none;
  font-size: 20px;
  color: white;
  border-radius: 0 5px 5px 0;
}

#mySidenav a:hover {
  left: 0;
}

#about {
  top: 20px;
  background-color: #4CAF50;
}

#blog {
  top: 80px;
  background-color: #2196F3;
}

#projects {
  top: 140px;
  background-color: #f44336;
}

#contact {
  top: 200px;
  background-color: #555
}
</style>
</head>
<body>

<div id="mySidenav" class="sidenav">
  <a href="#" id="about">About</a>
  <a href="#" id="blog">Blog</a>
  <a href="#" id="projects">Projects</a>
  <a href="#" id="contact">Contact</a>
</div>

<div style="margin-left:80px;">
  <h2>Hoverable Sidenav Buttons</h2>
  <p>Hover over the buttons in the left side navigation to open them.</p>
</div>
   
</body>
</html>
