[Vis Colors] Update default color in TSVB to use `ouiPaletteColorBlin…

…d()[0]` (#4363)

Signed-off-by: Manasvini B Suryanarayana <manasvis@amazon.com>

CHANGELOG.md

@@ -57,6 +57,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Remove unused Sass in `tile_map` plugin ([#4110](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4110))
 - [Table Visualization] Remove custom styling for text-align:center in favor of OUI utility class. ([#4164](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4164))
 - Replace the use of `bluebird` in `saved_objects` plugin ([#4026](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4026))
+- [Vis Colors] Update default color in TSVB to use `ouiPaletteColorBlind()[0]`([#4363](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4363))
 
 ### 🔩 Tests
 

src/plugins/vis_type_timeseries/public/metrics_type.ts

@@ -30,6 +30,7 @@
 
 import { i18n } from '@osd/i18n';
 
+import { euiPaletteColorBlind } from '@elastic/eui';
 // @ts-ignore
 import { metricsRequestHandler } from './request_handler';
 import { EditorController } from './application';
@@ -53,7 +54,7 @@ export const metricsVisDefinition = {
       series: [
         {
           id: '61ca57f1-469d-11e7-af02-69e470af7417',
-          color: '#68BC00',
+          color: euiPaletteColorBlind()[0],
           split_mode: 'everything',
           split_color_mode: 'opensearchDashboards',
           metrics: [