[Data Explorer] Fix darkmode for histogram (#4858)

* fix darkmode for histogram Signed-off-by: abbyhu2000 <[email protected]> * changelog Signed-off-by: abbyhu2000 <[email protected]> * remove changelog Signed-off-by: abbyhu2000 <[email protected]> --------- Signed-off-by: abbyhu2000 <[email protected]>
opensearch-project · Aug 31, 2023 · 89013da · 89013da
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diff --git a/src/plugins/discover/public/application/components/chart/_histogram.scss b/src/plugins/discover/public/application/components/chart/_histogram.scss
@@ -0,0 +1,11 @@
+.dscHistogram__header--partial {
+  font-weight: $euiFontWeightRegular;
+  min-width: $euiSize * 12;
+}
+
+// Temporary override to inlined styles provided by ElasticCharts theming
+// Will be unnecessary when we migrate the histogram to a different rendering library:
+// https: //github.com/opensearch-project/OpenSearch-Dashboards/issues/4643
+.dscHistogram .echChartBackground {
+  background-color: inherit !important;
+}
diff --git a/src/plugins/discover/public/application/components/chart/chart.tsx b/src/plugins/discover/public/application/components/chart/chart.tsx
@@ -3,6 +3,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+import './_histogram.scss';
+
 import React, { useCallback } from 'react';
 import moment from 'moment';
 import dateMath from '@elastic/datemath';