color scala - how to define the colors right : with a real example

[denzjos]

This can be usefull for you : https://www.w3schools.com/colors/colors_picker.asp (look under 'Color Picker')
Another one for information about colours: you can use a slider to view the colour at a certain position on a coloured bar (scroll down on the website page to LCH Color Mode)  https://www.prasannamestha.com/blog/scie...-gradients