Fix text stroke color not the same as the fill color

[davepagurek]

Resolves #518

It looks like we add a stroke to text to make it bolder. There were a few cases where we would update the fill color of text but not the stroke color, leading to a slight different-colored halo around text. It was happening in links before, see below:

Before:

After:

That said, it looks like this text stroke may be the cause of #473. I'm not sure how standard this property is, and whether it's a good idea to be using it across the board on body text like this. Possibly a sign that we should just be using a thicker font instead?

[Qianqianye]

Thanks @davepagurek. I'm merging this solution for now, and we can have schedule a chat with the web designer with all the issues and PRs labelled Web Design soon.