is it possible to give a colour or to create a label for a list?

[Elise]

I would like to categorize the lists of my Trello board : give them a colour or a label in order to bring logic in lists.

PS sort by label or colour would be nice too

[Dreamsuite Mike]

This isn't a feature built into Trello but there is a chrome (and Edge) extension that will allow you to modify the colour of lists.

Pro for Trello, FREE Trello tweaks - Chrome Web Store (google.com)

Alternatively, you can use header cards with coloured covers.  You could use advanced card covers for more colour options

Advanced Card Covers - Tiny Power-Ups Club

@Brittany Joiner has done a great little video to show how to pin cards to the top of a list

Pinning a Card To Top of List in Trello 

[Brittany Joiner]

thanks for the mention @Dreamsuite Mike !