I have an xp-pen artist 15.6 pro, when I draw on it the colors on the tablet look much better than those on the connected laptop, for example they are brighter on the tablet and then just look flat on the laptop. How can I adjust the colors?
By calibrating the corresponding screens / displays.
The manual adjustment of the color values via the screen settings / graphics card driver will only get you there with some advances and, in the worst case, bring you closer to the more distorted colors.
There are software and guides that can help approximate the colors https://www.pc-magazin.de/ratgeber/monitor-kalibrieren-perfekt-einstellen-kostenlos-tipps-tools-3197217.html
But if real color fidelity is important to you, you need appropriate calibration aids such as the Atomos Spyder Calibration Unit (from approx. 120 Eur). But the graphics created should serve at least some professional purpose. For breadless passion, you can think twice about such an acquisition.
It's the same problem for me.
My new printer is coming soon and I have the question, what color will the printer print it with?
With the color of my drawing tablet (which looks better and brighter) or with that of the laptop (more paler and paler)?
What is the "original color" of my drawn picture?