[feature]: Ability to set theme style for Kanban card title

Is there an existing issue for this?

• I have searched the existing issues

Summary

It would be helpful to enable users to increase card title size and contrast in the custom theme.

For example (forgive my design skills):

Why should this be worked on?

There is a natural heirarchy of information on a card - the title is the most important thing.

Currently Plane's low-contrast light-grey theme makes it difficult for some users to identify key information. On cards especially it is easy for the main information to get lost - in this example I would like to be able to increase the size and increase the contrast of the phrase "Search for issues" as this is the most important piece of information:

Setting to high contrast theme does not resolve this issue because it still does not emphasise the title over other information.