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### Steps to reproduce

1. Login as a user with permissions to edit a document

2. Navigate to a document and add a work package inline chip i.e. via `"###KSTP-1"`  

3. Click Enter so the chip is rendered into the document


### What is the buggy behavior?

* The Begin of the insertiongrey-ishEnd of the insertion Begin of the deletion grey0ishEnd of the deletion font color over Begin of the insertiongrayEnd of the insertion Begin of the deletion gratEnd of the deletion background is very touch to read - even when OpenProject is set to _Light High Contrast color mode_


<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/921452/content">

### What is the expected behavior?

1. The text should have better contrast and honor increased contrast modes applicable in Begin of the insertionOpenProjectEnd of the insertion Begin of the deletion openprojectEnd of the deletion


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