After moving the mouse, the color in the triangle does not change. how to change it? I'm trying to do it, but I can not do it.

<https://jsfiddle.net/m59azhn8/3/>

```
<button type="submit">Turn to the dark side</button>

```

CSS:

```
    * {
     text-align: center;
    margin: 0;
    padding: 0;

}

button[type=submit] {
    padding: 20px 30px;
    background-color:black;
    border: 0;
    position: relative;
    color: #ffe200;
    font-size: 22px;
}

button[type=submit]:after {
    content: '';
    border-width: 23px;
    border-color: transparent black black transparent;
    border-style: solid;
    position: absolute;
    top: 9.5px;
    left: 228px;
    -webkit-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    transform: rotate(-45deg);
}

button[type=submit]:hover {
    color: black;
    background-color: #ffe200;
    border-color: transparent #ffe200 #ffe200 transparent;
}

```