Color Changes When Copying From Illustrator To Indesign

Alright, I’m having the following problem:

If I copy a colored object, say, a simple square, that has a color value of #30b1f2, this WILL change to #30b0f2 when pasting the square in Indesign.

When I copy from Indesign to Illustrator, no changes take place. It’s only when copying from Illustrator to Indesign.

The following settings are the same in both documents:

– identical color space for flattening transparencies: RGB (even though no transparencies exist)
– identical sRGB as working profile (no CMYK elements whatsoever exist in my Indesign document)
– identical color conversion settings: absolute colorimetric RI, no black point conversion (even though this probably should not matter when it comes to simple colord vectors)

As I need to copy a large amount of colors, it is not feasible for me to double-check everything. The difference that occurs in the example I’ve given is not even visible—yet, the colors do absolutely have to be the intended values and not randomly different by a damn bit or two.

The most common solutions that are frequently mentioned on this forum haven’t been of much help. I’m really lost here.