I have some problem with overlay mode in Illustrator

[Merks295447365swm]

What is the problem here? When i try overlay multiples colors, the grey and braun works, the yellow and red not.

[Monika Gause]

Your screenshot is tiny.

Please tell us the exact steps and make a more detailed screenshot. Also: please point to the issue.

[Ton Frederiks]

That's probably how Overlay blend mode works, reading about it is sometimes hard to visualise.

Google Overlay blend mode or look here:

https://helpx.adobe.com/illustrator/using/transparency-blending-modes.html