Standard red no longer standard in Word - oops or worse?

The "Standard" colour red, which has forever been defined as #FF0000 (or if you prefer, RGB 255,0,0) is now defined as #EE0000 (238,0,0) in Word.

Why?

This feels unintentional, but if it was a design choice that's even more frustrating. 

It's still #FF0000 in PowerPoint and Excel. I hope they're not next.

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Optional background aka venting:

I teach trades college on and off and I have hundreds of question sheets and a couple of extensive reference / workbook documents in which I put all the answers to student questions in "standard" red font colour to create an instructor's key edition. Then to create the student version all I need to do is use the Replace function to search arbitrary text with the red colour attribute and replace each occurrence with a single blank space. (The space keeps formatting from collapsing if I'm also careful to make sure the paragraph end codes are still in black.)

This has been a big time-saver for keeping key and student versions matched when revisions are made, and as a bonus, the red text makes the answers pop in the key which is nice.

I just made a few minor updates on one of these docs and guess what happened when I tried to replace all the text in "standard" red? Yup. None found.

I opened a support session during which I managed to identify the problem and my required workaround by myself after the support tech had me try my method in a new document and it worked. In the session wrap-up this was identified as a "document formatting" (aka my) problem vs an application functionality (aka their) problem. To which my response would've been (had I turned my inner Karen loose) "and what do you suppose all that old document formatting was done with y'all?"

I'm grateful that I can deal with it, but I remain mildly miffed, slightly baffled, and out a couple of hours that I will never get back.