.cities-boston {
  background-image: url(city-event-boston.png);
}
.cities-brussels {
  background-image: url(city-event-brussels.png);
}
.cities-chicago {
  background-image: url(city-event-chicago.png);
}
.cities-dc {
  background-image: url(city-event-dc.png);
}
.cities-detroit {
  background-image: url(city-event-detroit.png);
}
.cities-la {
  background-image: url(city-event-la.png);
}
.cities-london {
  background-image: url(city-event-london.png);
}
.cities-melbourne {
  background-image: url(city-event-melbourne.png);
}
.cities-nyc {
  background-image: url(city-event-nyc.png);
}
.cities-paris {
  background-image: url(city-event-paris.png);
}
.cities-sf {
  background-image: url(city-event-sf.png);
}
.cities-sydney {
  background-image: url(city-event-sydney.png);
}
.cities-toronto {
  background-image: url(city-event-toronto.png);
}
.cities-vancouver {
  background-image: url(city-event-vancouver.png);
}
.cities-dc .city-host,
.cities-la .city-host,
.cities-vancouver .city-host {
  color: #1498BE; /* blue */
}
.cities-chicago .city-host {
  color: #0E718D; /* dark blue */
}
.cities-sydney .city-host {
  color: #60BAD5; /* light blue */
}
.cities-boston .city-host,
.cities-detroit .city-host {
  color: #D0021B; /* red */
}
.cities-nyc .city-host {
  color: #790412; /* dark red */
}
.cities-london .city-host,
.cities-paris .city-host,
.cities-vancouver .city-host {
  color: #6F6F96; /* purple */
}
.cities-brussels .city-host,
.cities-sf .city-host, .cities-melbourne .city-host {
  color: #899E2A; /* green */
}