Steps to Reproduce

In project settings enable forward rendering
Create a new particle and double click to open cascade editor
Bring out Background color panel for picking or changing background color
Nothing happen in the viewport

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Fixed
ComponentUE - Graphics Features
Affects Versions4.144.15
Target Fix4.18
Fix Commit3576708
Main Commit3608256
Release Commit3643070
CreatedDec 13, 2016
ResolvedAug 8, 2017
UpdatedJun 23, 2018
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