Embossing render bug. My coloured shapes get white and black lines on the sides.

Not sure what is causing this issue but I have had this problem for years and always ended up ignoring it. Never found any video or discussion on this topic. Don't really know how to describe the issue either - so bare with me.

Please look at the letters above. These are simple shape layers with one colour fill and without any effects. If you look closely you can see a lighter colour on the left and a darker colour on the right. It becomes almost like an embossing of the shapes which is why I chose to call it the "Embossing render bug".

I have tried:

• Bumping up my bit-depth in my colour settings
• RGB Straight
• "Remove colour matting" effect
• Scaling up my compositions to very high resolutions
• Rendering with After Effects renderer and Media Encoder
• Many different file formats
• All sorts of colour/video settings in both After Effects and Media Encoder

Nothing has worked for me so far and I would really appreciate a solution. Please let me know if you are experiencing this issue too because I can't find this issue anywhere else and I don't understand how nobody else has this bug.

Thanks in advance,

Seba