Board and piece colour will all be personal preference... However there is scientific evidence that humans find browns and beige and certain shades of green very easy on the eye... Which is hardly a shocker because as we evolved over thousands of years, those are the colours that most of the planet is made up of. So it wouldn't surprise me one bit if a large majority of people preferred those colours. Personally I prefer the brown colour board on here with the wood colour pieces.... And my favourite real board is my Walnut and Maple with black and natural light wood colour pieces. They all contrast lovely with each other, but they are all very complimentary natural colours going from beige to tan to brown to black.. Really easy on the eye and lovely to play on. I also have a olive green silicone roll up board which is also fine, but i definitely prefer the wood board... The biggest thing for me is that the board and pieces should be a matt finish and not at all glossy, in other words, if I only had a choice between a matt blue and white board and a highly glossy green and white one I would choose the matt blue one. Hope that all makes sense. Cheers.
Opinions Please - Best Board and Piece Colours for Focus, Concentration and Easy On the Eyes

I use green colour along with white. Green is so natural and makes me happy. It helps me focus better and is good for long term.

Last night my tired eyes were reading an article that said for reading it's best to have a light background with a dark font (hence the standard black-on-white format for text editors.) It was mostly explaining in detail why blue light is hardest on the eyes and should be phased out after sunset for good sleep hygiene, BUT--naturally--I found myself attempting to apply the dark-on-light principle to my board and piece colors, especially since I was playing too much chess.com late into the night.
This experiment led to some bizarre-looking setups. The main problem I encountered is that, according to this theory, the pieces (the "font") should be darker than the squares (the "background.") But getting the White pieces to be darker than the light squares in any significant capacity proved difficult; even the so-called "Bubblegum"-themed pieces didn't cut it.
Do you all have any thoughts on this? Would the principle apply to chess sets as well?
Also: the article did indeed give much praise to the color green. I used to prefer the "Tournament" theme, but now I'm leaning towards 8-bit.
I think the tendency for many online players is to select green or tan colour for the dark squares because that is the colours you are likely to encounter at an OTB tournament, so in this way you mimic the "real" world. And indeed those are the colours most likely to be seen in online articles and instructional videos.
But if you play exclusively online, then there is an opportunity to re-think that.
I'm wondering what colours people are finding most conducive to focusing attention and also easy on the eyes for hours of play. Also wondering if there has been much research on this topic.
Perhaps a certain colour combination would be best for blitz but a different colour combination would be better for standard play.
Any thoughts?