<div class="wrap">
<input list="colores" name="colores" type="text" placeholder="Elige un color">
<datalist id="colores">
    <option value="Azul"></option>
    <option value="Amarillo"></option>
    <option value="Burdeos"></option>
    <option value="Caoba"></option>
    <option value="Marrón"></option>
    <option value="Naranja"></option>
    <option value="Verde"></option>
</datalist>
</div>

body {
  font-family: sans-serif;
  font-size: 16px;
  line-height: 1.5;
  background: #eee;
}

.wrap {
  width: 80%;
  margin: 1em auto;
  padding: 1em 5%;
  background: #fff;
}
h1, h2 {
  margin-bottom: .5em;
}
h1 {
  font-size: 2em;
}
h2 {
  font-size: 1.6em;
}

p {
  margin-bottom: 1em;
}
input {
  width: 300px;
  height: 40px;
  border: 2px solid #ccc;
  line-height: 40px;
  font-family: Verdana;
  font-size: 16px;
  color: #333;
  padding: 5px;
}
input:focus {
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.075) inset, 0 0 8px rgba(102, 175, 233, 0.6);
   border-color: rgb(102, 175, 233);
}