Template:Tournament/styles.css

.mw-parser-output .infobox-tournament .infobox-title{
  background:linear-gradient(135deg,#1a3557,#3b6fa7);
}
.mw-parser-output .infobox-tournament .infobox-image,
.mw-parser-output .infobox-tournament .infobox-caption{
  background:linear-gradient(180deg,#eef4ff,rgba(255,255,255,.92));
}
.mw-parser-output .infobox-tournament th{
  color:#23456f;
}