.sponser_logo{
  width: 200px;
  height: 200px;
  -webkit-filter: grayscale(100%); /* Safari 6.0 - 9.0 */
  filter: grayscale(100%);
  border-radius: 40%;
}

.sponser_name{
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-weight: bold;
}

.sponser_type{
  font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
}

@keyframes toColor {
  0%    { -webkit-filter: grayscale(100%); filter: grayscale(100%); }
  25%   { -webkit-filter: grayscale(75%); filter: grayscale(75%); }
  50%   { -webkit-filter: grayscale(50%); filter: grayscale(50%); }
  75%   { -webkit-filter: grayscale(25%); filter: grayscale(25%); }
  100%  { -webkit-filter: grayscale(0%); filter: grayscale(0%); }
}


img.sponser_logo:hover {
  animation: toColor 0.5s;
  -webkit-filter: grayscale(0%); /* Safari 6.0 - 9.0 */
  filter: grayscale(0%);
}