Peugeot 207, Head gasket blown?

4 vti coolant has a brownish color and its oily to the touch. I did an oil change about two weeks ago, I’m wondering if it could be connected, the coolant level didn’t really budge.
I remember the Coolant color was blue last month. I checked the Oil cap and I’ve the Mayonnaise gunk.

the most confusing part of this problem is that the car is running really well, no engine light, misfires very quiet and revving good, temperature stays rock solid at 90c, not even blue smoke, or any smoke of anykind to be precise.

I’m wondering if this is a blown head casket ? I will do a compression test tomorrow.
my A/C system doesn’t work neither but the car seems to heat well.

Thank you very much for any help diagnosing my car.