CODE EXAMPLE FOR CSS

how to change button border color in css

<style>
.tweet-button {
    background-color: rgb(81, 131, 211);
    color:white;
    border:none;
    height: 36px;
    width: 75;
    font-weight: bold;
    border-radius:18px;
    margin-right: 8px;
    cursor: pointer;
}
<style>