Frontmatter highlighting colors different in editor and viewer

Hey, I have another issue with the new frontmatter highlighting in the prerelease (v3.6.3).

The highlighting has different colors on the editor vs. the viewer. I think this has been an issue for a while for codeblocks and stuff but it hasn't bothered me that much in the past. The frontmatter however looks way better in the editor (left side) than in the viewer in my opinion, and now it's bothering me because I use frontmatter a lot:

Additionally, just because I don't want to open a third thread about the frontmatter highlighting, the rendering is weird when there is a mix of numbers and letters in the frontmatter:


I would expect the right side of the colon to be rendered in the same color, no matter the content. Since this is valid yaml, I would expect the syntax highlighting to be more consistent.
Maybe this second issue is actually a bug, in that case I can also open a ticket for that on Github.