Sepia Mode

Above is a concept image that I made!

A sepia mode, along with the normal dark and light modes, would be really nice to have. Not only does it just look cool, but it's also good on the eyes.

"Research shows that switching from white to the sepia background, the strain on the eye reduces since the sepia spectrum is softer than the white spectrum. The effective radiance in the sepia background is nearly 25% lower than in the white background. This means lower screen luminescence and hence lesser visual fatigue, the lesser strain on the eyes. Visual eye fatigue is lesser while reading in the sepia background as compared to the white background. There is more eye strain, blurry vision, and tiredness in the white background in comparison with the sepia background." (Source)

So, I feel like having a sepia option would be great, especially as sort of a middle ground between the burning light mode and the usual dark mode.