Protanopia & Deuteranopia themes use too similar colors

[alxs]

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The color used for additions is indistinguishable from that used for collapsed sections - at least for people with Deuteranopia. This makes it difficult for users to differentiate between the two and can lead to confusion and potential mistakes during the code review process.

Protanopia & Deuteranopia	Normal

Note that this also applies to the dark theme.

Why it's an issue:

• Confusion during code review: When reviewing changes in code, it's essential to quickly and accurately identify additions and collapsed sections. The inability to distinguish these two elements can cause confusion, leading to an inefficient code review process and potential errors.

• Decreased readability: Colors play a crucial role in enhancing the readability and user experience of any interface. When colors are too similar, it becomes challenging to differentiate between various elements, which can decrease the overall readability of the code.

• Inaccurate understanding of changes: If users are unable to identify the additions properly, they may not have a clear understanding of the changes made. This can result in an incorrect assessment of the changes' impact and may lead to incorrect decisions during the review process.

• Accessibility concerns: For users with color vision deficiencies, the inability to distinguish between similar colors can exacerbate the problem, making the interface even more challenging to use and understand.

[cehfisher]

Hello @alxs - thank you for providing this feedback! We will file this with our Accessibility team so that it can be reviewed and will follow-up here with any additional questions or updates. Thanks again!

[github-actions[bot]]

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