Hi @Kacky — welcome to the forum.
You might want to search the forum for other people using the sensor. For example:
- @frank_schmidt has posted a video showing an example: Video:Color Sensor RGB with Micro:bit and LED Color Display .
- It looks like someone created an extension to support it: https://github.com/samnied/pxt-tcs34725 (Thanks to @MKleinSB, who shared the extension in this post: Micro:bit and external color sensor? - #3 by mathpun).