When you go to dye a sign, it functions as expected. When you apply Glow Squid Ink to it, it does not function as expected. In java, the text is much brighter and has a trim applied to it. In bedrock, there is no trim present, and it looks like the brightness was only slightly adjusted. I'm sure this is some graphical error. I tried this with multiple sign types and colors of dye with the same effect.  

I think this might have something to do with the fact that dying signs, a prerequisite for glow inking them, was not present in bedrock before 1.17, so the team had to catch up or else glow ink would be losing 50% of its entire functionality compared to its Java counterpart. In their catching up, they may have forgotten to flesh the feature out. I really hope that this is a bug or error and not a parity thing.  

Attached are images comparing the glow ink signs on both versions. The difference is almost literally night and day, haha.  

Thank you for your consideration.