Not broken at all. If you do even rudimentary UX analysis with people, even taking cultural differences into consideration, you will find that most people equate a red coloured button with something dangerous or that can cause an adverse effect, and green/blue with a positive outcome.
Hence why in most cases, a save button will be green or blue or another cool colour, whereas a cancel or delete button will generally be red or yellow to stand out, or else a very muted colour so as not to draw attention.
And speaking of the NASA and USAF research, I used to be a commercial pilot, and studied those UX principles that were done way back in the 40's and 50's because they are still relevant today. Most aircraft instrumentation is very colour oriented, so that in the busy working conditions of a cockpit, you know almost instantly when gauges are 'in the red' or 'in the green'. There is simply no time to read the numbers in some cases, so you tend to get used to seeing either the colours, or the relative angle of gauge needles to ascertain whether you are in trouble or not.
Similarly, if I am tabbing through Vivaldi windows, I can tell far quicker whether I am on HN by noticing the quintessential "Hacker News Orange" colour on the frame of the browser, than I can by trying to parse something like: "https://news.ycombinator.com/reply?id=13334188&goto=item%3Fi... on a 1cm high URL bar with my 50 year old eyesight.
I browse several other sites that use the same fawn colour for the main body of the site, but HN always has the orange outline in Vivaldi, even if the header bar is out of sight on the page.
Same for the Facebook deep blue, or the Twitter light blue, or any of my 6 different web apps, which are all Bootstrap based but have a different Vivaldi coloured frames based on their logo and other interface colouring.
There is a reason why most big brands are fussy about the colours of their logos and image assets. The fact that Vivaldi actually USES that branding in their general UI to further identify that site is a positive move IMO.
Hence why in most cases, a save button will be green or blue or another cool colour, whereas a cancel or delete button will generally be red or yellow to stand out, or else a very muted colour so as not to draw attention.
And speaking of the NASA and USAF research, I used to be a commercial pilot, and studied those UX principles that were done way back in the 40's and 50's because they are still relevant today. Most aircraft instrumentation is very colour oriented, so that in the busy working conditions of a cockpit, you know almost instantly when gauges are 'in the red' or 'in the green'. There is simply no time to read the numbers in some cases, so you tend to get used to seeing either the colours, or the relative angle of gauge needles to ascertain whether you are in trouble or not.
Similarly, if I am tabbing through Vivaldi windows, I can tell far quicker whether I am on HN by noticing the quintessential "Hacker News Orange" colour on the frame of the browser, than I can by trying to parse something like: "https://news.ycombinator.com/reply?id=13334188&goto=item%3Fi... on a 1cm high URL bar with my 50 year old eyesight.
I browse several other sites that use the same fawn colour for the main body of the site, but HN always has the orange outline in Vivaldi, even if the header bar is out of sight on the page.
Same for the Facebook deep blue, or the Twitter light blue, or any of my 6 different web apps, which are all Bootstrap based but have a different Vivaldi coloured frames based on their logo and other interface colouring.
There is a reason why most big brands are fussy about the colours of their logos and image assets. The fact that Vivaldi actually USES that branding in their general UI to further identify that site is a positive move IMO.