stable-diffusion-webui-state/style.css

#settings_state_buttons button {
    color: white;
    background: rgb(249, 115, 22);
    border-radius: 8px;
    padding: 5px 15px;
    font-weight: bold;
    font-size: 16px;
    margin-left: 5px;
    margin-right: 5px;
}