I have this color picker and I wanted to add some plus sign or something like more colors text on my color picker how do I do that? For now there is this hyphen on the color picker:

.more_colors {
position: relative;
top: 4px;
left: 2cm;
padding: 10px 20px;
cursor: pointer;
border-radius: 20px;
background-color: rgb(152, 219, 43);
}
<input class="more_colors" id="colorpicker" type="color" value="#e6f28a">