The background colors and text of the Job Offer Letter is not showing when opened in RTF

Summary:The background colors and text of the Job Offer Letter is not showing.

Content (required):My client's custom Job Offer Letter contains some background colors and text. When the Recruiter is in the process of creating a job offer and downloads the Offer Letter then it downloads in RTF format but the background colors and text are not showing. How do I show the background color and text as this is vital part of the client's offical letters?

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