How to choose the right color?

Question

Design

I'm not a designer myself, but I'm asking for help. The question of color gamut for the project... How to choose the color gamut, the website palette, if everyone has their own monitors, with their own contrast and brightness lines.

Here, for example, the color #DEF5FF is the color of a pale sky, on one monitor I don’t have it at all, on the second it is a normal shade. How can I make sure the colors don't disappear? I read that there are html colors, but they are terrible and miserable.
How designers work, tell me.

Answer 1

Approximately. You are a designer.

Answer 2

How to choose shades so that they are the same everywhere.

No way. Not only monitors, but also the eyes are different.
It is necessary to select COMBINATIONS, not specific colors.
About html color is generally some kind of nonsense.

Answer 3

The first is to choose color combinations around Itten's circle. To be honest, the tool is not very good for me, but still useful.
Second . Play around with the amount of dark and light shades.
Third , to see the contrast level, especially applicable when placing text on the background
. I think that's enough for you.

Answer 4

I'm not a designer, but Google suggests
this and that .

Answer 5

Monitor is normal to have

Answer 6

The color scheme is selected on a good monitor. For the web, sRGB 100% and Delta E≤2 are fine.

Answer 7

And printing is a completely different story, you start sending it to print and it's the same story as with monitors.
About monitors, on one monitor the colors of the upwork website are correct, dark green, on the second it is poisonous green, nothing can be done about it.
A good monitor to help and select the best combinations.