Template:Functions/styles.css

.functions-sidebar .sidebar-title,
.functions-sidebar .sidebar-title-with-pretitle {
  background-color: #ffc894;
  letter-spacing: 0.0125em;
  color: var(--color-emphasized);
}

.functions-sidebar .sidebar-heading {
  background: var(--background-color-neutral);
  font-size: 115%;
  font-weight: 500;
  color: var(--color-base);
  border-top: 1px solid var(--border-color-base);
  padding: 5px 0 5px;
}

.functions-sidebar .sidebar-heading.last-heading {
  border-bottom: 1px solid var(--border-color-base);
}