How to change label colour dynamically?

[ilias iliadis]

Is there a way to change the label colour dynamically, a.k.a. depending on some user interaction with the app? example: every time user presses some button?
(Sorry for the subject. I do not know if it is considered good practice creating new subject with the same name, but the other subject, with the same name, is about "setting the initial colour" -question and answers found there- and not changing it dynamically)
Thanks
ilias

[Leonardo Rodriguez]

example:

file.kv

    Label:

       id: clab

       text: "hello there"

      background_color: 0,0,0,1

      color: 1,1,1,1  

in the main.py

...

   self.ids.clab.color = [1,0,0,1]                           #label id referenced

   self.ids.clav.background_color = [0,1,1,1]

You can also change de text color like this

self.ids.clab.markup = True   #this property must be set to true in order to make possible the text of the label to be procesed

self.ids.clab.text = "[color=ff0000]Hello[/color][color=00ff00]World[/color]"

[ilias iliadis]

Thanks, is working!