# KIII Theme modification

**URL:** <https://forum.getkirby.com/t/kiii-theme-modification/27141>\
**Category:** Themes\
**Tags:** v3\
**Created:** [November 29, 2022, 2:00pm UTC](https://forum.getkirby.com/t/kiii-theme-modification/27141 "2022-11-29T14:00:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![KeanuZ](https://avatars.discourse-cdn.com/v4/letter/k/bcef8e/32.png) [@KeanuZ](https://forum.getkirby.com/u/KeanuZ)\
**Post date:** [November 29, 2022, 2:00pm UTC](https://forum.getkirby.com/t/kiii-theme-modification/27141/1 "2022-11-29T14:00:51Z")

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Hi all,

Thanks a lot for your wonderful work on Kirby.

I have very little skills in web coding, yet I still tried to make a website using KIII theme for my sister’s activity.

Here’s the link of the website : [https://www.vertussauvages.fr/fr](https://www.vertussauvages.fr/fr)

I would like my header, navbar and footer to have a width of 100% on the website. I managed to add a header section with an image on top of my navbar by modifying the snippet “Header” and adding a header section to my panel, but I can’t find where to extend the width of it.

After some research I guess I need to modify some lines in the assets/css/grid part, regarding the container of the site, but I don’t know which ones.

Also I couldn’t find the info on how to colorize basic text in the website.

Thanks a lot for you help,