i had been puzzling for years over the way that myself and other people have different notions or understandings of the colours we call PURPLE
bluebells look purple to me, so do violets, so does lavender ... each in their different ways
some time ago i had settled on the vague notion that the purples occupy a borderless territory BETWEEN THE REDS AND THE BLUES
my own understanding was that purple is akin to VIOLET
but others might visualize a hue closer to MAGENTA
how is that borderless territory MAPPED ?
it turns out that the knowledge i lack has been in plain view for half a century, or more !
i set out to search for a web designer's colour-swatch ...
i quickly got a reminder that screen colours are never universally consistent ... much depends on the chemistry of your display pixels
and the notions of actually defining colours are inhibited by the mode of control ... 8-bit or 16-bit for instance
https://en.wikipedia.org/wiki/Web_colors
Color Chart — HTML Color Codes
Color Picker — HTML Color Codes
and then there is the difference between display colours and real-world colours ... coloured objects and substances in the real world have texture and density
nevertheless, it is helpful to understand how screen colours are controlled and generated
the crux of the matter comes down to COLOUR SPACE
COLOUR SPACE seems to be the portion of visible colours that a particular system can define and project and control ... the problem is there are many systems and they all occupy their slightly different and unique portions of the available colour map
the second part of that problem is that many internet processors automatically streamline and reduce that colour space during transmission
here's a lucid explanation ...
sRGB or AdobeRGB Color Space? | Ask David Bergman (youtube.com)