@adobe/spectrum-css/dist/components/dropindicator/multiStops/dark.css

The Spectrum CSS top-level backwards compatible package

.spectrum--dark .spectrum-DropIndicator {
  background: rgb(38, 128, 235);
}
.spectrum--dark .spectrum-DropIndicator:before,
.spectrum--dark .spectrum-DropIndicator:after {
    border-color: rgb(38, 128, 235);
  }