Font in hover window can be hard to read for specifc colors & Font of labels is not readable on bright colors

[stjeske]

Describe the bug

Dark font color is hard to read within hover window in Subgroup Explorer Graph and labels are not readable when background color is brigt since font is always white

Steps to reproduce

Select a specific subgroup and then hover over the selected point

Expected behavior

Hover font should always be readable

Screenshots/Error Messages

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R Version

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RStudio Version

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Subscreen Version

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Browser

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Operating System

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Device

None

Package Dependencies

Additional context

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Minimal Reproducible Example