I don’t use it, was just answering a question.
I think there is a lot of hard evidence in scientific studies about color itself, human visual systems, etc etc.
Part of it is cultural, part of it is our primal human brain. It is certainly partially subjective, but a large portion is backed up by science.
The increase in speed and snappiness. It was obvious right from first using v4.4. I’m still working through all the changes but this stands out to me and any improvement in speed is always welcome.
edit: fix typo.
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4.4 coincided with having my previous laptop die a sudden and painful death and getting a new laptop with improved AMD CPU, Graphics card and SSD so I just presumed the computer was responsible. I really like how I can now move a slider and see instance response in 4.4. Also the diffuse or sharpen module no longer means a coffee break while it processes. The developers have done a great job improving the speed.
Well I’m certainly no expert in colour theory, but the section on Colour Harmony in Wikipedia seems persuasive.
It says there are lots of other factors in colour perception that make simple rules for colour harmony less useful.
I’d be interested to see any references to hard evidence / scientific experiments on this stuff.
And to be specific: Do colours really have meaning? across all cultures??
Are complementary colours really perceived as higher contrast than non complementary?
Are blue colours really perceived as distant? and red perceived as close up?
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Then your best bet is a university library. At least here in Europe most are freey accessible (perhaps after contacting them). And the librarians can help you find the proper sections.
A lot of scientific literature is either not available on the internet or you only get abstracts, full texts need to paid for(*). In addition, most articles are very specialised, best look for review articles and books (at least initially).
(*: there are scientific journals that are freely accessible, but that is because the author has to pay to get the article published. Payment is after acceptation of the article, which may tempt the journal to be less critical about the quality, to stay polite. Most of the well-regarded scientific journals do not require payment from authors, but have articles vetted through a process called peer review, which costs them money, to be recovered from the readers: university libraries, scientific institutes, etc.)
From memory: in most cultures colours have meaning/symbolic values. But the meanings can vary wildly between cultures. Even colour perception is cultural (in that different cultures have different concepts for colours, and don’t distinguish them along the same lines).
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As a scientist I have to say open journals are no less stringent in peer review. Many scientists, myself included, only publish in open journals to freely share information. The foss community should understand this. Google scholar can be helpful for searching. But in all honesty are we talking artistic expression or science when we discuss the topic of colour science. Please no offence intended to anyone here.
This one used to be available: Did your primary school teacher lie to you about colour? | News | Victoria University of Wellington
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Some are, some are … less so… It probably also varies between fields.
The issue is not so much the “open”, the problems start when the author has to pay for publication. At that point, the journal has an economic interest to publish as many articles as possible. And some abuse that (see e.g.
https://en.wikipedia.org/wiki/Predatory_publishing )
Have you heard of SciHub? they are on the Web - and there is a special website that will help you find their latest location just type g o o g l e . c o m into your browser
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Predatory publishing is a different issue that gets all scientific publications a bad name. However, many funding bodies now insist upon open publications of results. Either way publications seem to be a business.
Interesting!
I guess that is the point I was trying to make. I support the addition of the colour harmony stuff in DT 4.4 even though I am sceptical about the pseudo science behind some of the ways it is promoted.
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Right…
I guess I’ll shut my mouth, since I seem to be an idiot.
Our last one cost us over 5K US to publish… 
Don’t use google.com for scientific searches, use scholar.google.com instead.
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Now that brings me back to my question when color harmony was first mentioned by @sushey. Where is it and what is it in darktable?
Sad as that is, I wouldn’t know how to do science without sci-hub and libgen.
@Terry it’s in the histogram, I guess.
