This has been discussed on many threads since they started removing the HCoE icons from the castle.
They have, indeed, been repainting the WDW MK castle for weeks (that's why the crane was still there long after the icons had been removed.)
The castle is two (or more) colors now.
It is designed to make the textures look like more "authentic" to real castles.
The beige tone could show up with a "pinkish" cast on some video screens if the techs adjust the cameras for "minus-blue" for outdoor shooting.
Speaking as a long-time video producer, most folks' sets at home are misadjusted just enough that the colors never look "exactly right" on any scene.
In person, (I just got back) it looks very nice and it is so subtle a difference that most folks simply can't tell it looks any different without someone pointing it out.
But, hey, we all love to make a "big deal" out of anything at all that Disney does to any part of any park, so have at it.