How to choose the exact color shade that the printer will print?

Question

Python

It is required to choose the appropriate color on the computer so that the desired one is printed. I think the most suitable option is to print a sheet with examples of colors, each of which will have indents in tone, shade, relative to the color I have chosen. Coloring the cubes with your hands in Corel is not a hunt, so the idea comes to write a program in python.) Could you direct me in the right direction, with which modules to write a program, what is the best way? What variables need to be changed in CMYK, RGB?

Answer 1

The tips in the first answer helped me. I downloaded the pantone table and printed everything on the printer, then I chose the appropriate color on the sheet, and on the computer I made a fill in Corel from the file with a pipette)

Answer 2

That's what pantones are for.
en.wikipedia.org/wiki/%D0%A6%D0%B2%D0%B5%D1%82%D0%...
But if we talk about color proofs... then... oh... in short, put the CISS and long and hard doing and doing tests.
en.wikipedia.org/wiki/%D0%A6%D0%B2%D0%B5%D1%82%D0%...

Answer 3

Once upon a time, these articles helped me a lot: 1 and 2 . Then I first learned about pil (pillow), and that you can do various amazing things with graphics in python. I think this is what you need. The rest is in the documentation . You will need the ImageDraw module , and in it PIL.ImageDraw.Draw.rectangle to draw rectangles.
PS There are differences between pil (python 2.7) and pillow (python 3.x). I do not remember the nuances, but everything is simple there.

Answer 4

You need to dig into the area of ​​Color Management System and device profiling. Professional services for calibrating a monitor-printer link are not cheap, but this is the only true method (well, or calibrate it yourself by getting a spectrophotometer somewhere and spending a couple of weeks on a thoughtful study of the theoretical side of the issue). At the output, you will get an .icc color profile, by installing which on a computer, you will see the same colors on this calibrated monitor as on this analyzed printer. And when I say "the same colors", I mean the maximum approximation to them, because the color gamut of digital displays is always smaller than the physical print. Well, if the monitor is lousy - you can safely score on trying to make the picture on a piece of paper look like a picture from the monitor.
All other methods will not improve the average result, i.e., for example, the result will seem improved to you, and the other pair of eyeballs will see at least the same result, or even worse. So you need to profile devices and calibrate if it's a serious matter.