Could you consider adding separate color definitions for inline code (text and background) in the theme file?
I rely heavily on strongly distinguishable styling for inline code, but currently it shares the same formatting as regular block code.
For backward compatibility, the default theme could simply use the same colors as it does now. However, separating these settings would allow users who know how to customize themes to fine-tune the appearance much better.
A somewhat similar limitation exists with callout colors, which currently depend on highlight colors. But even just separating the inline code color definitions would already be a big improvement.
Best regards