.increase:after,
.decrease:after {
  display: inline-block;
  padding-right:0.2em;
  color: $primary-colour;
}

.increase:after {
  content: "\25B2";
}

.decrease:after {
  content: "\25BC";
}

.improvement:after {
  color: $positive-colour;
}

.decline:after {
  color: $negative-colour;
}

.no-change:after {
  content: "\25CF";
  color: silver;
  margin-right: 5px;
}
.increase:after,
.decrease:after {
  display: inline-block;
  padding-right:0.2em;
  color: $grey-2;
}

.increase:after {
  content: "\25B2";
}

.decrease:after {
  content: "\25BC";
}

.improvement:after {
  color: $positive-colour;
}

.decline:after {
  color: $negative-colour;
}

.no-change:after {
  content: "\25CF";
  color: $grey-2;
  margin-right: 5px;
  margin-left: 2px;
}
Make delta arrows a lighter grey
Make delta arrows a lighter grey
