Animation fill mode help

i need help. icant pass this animation-fill-mode exercise for the last two weeks and i see nothing wrong with my code

Your code so far

  button {
    border-radius: 5px;
    color: white;
    background-color: #0F5897;
    padding: 5px 10px 8px 10px;
  button:hover {
    animation-name: background-color;
    animation-duration: 500ms;
    /* add your code below this line */
    animation-fill-mode: fowards;
    /* add your code above this line */
  @keyframes background-color {
    100% {
      background-color: #4791d0;

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0.

Link to the challenge:

The spelling is:

animation-fill-mode: forwards;

Hi, the value for animation-fill-mode property should be forwards. you used fowards.