Kibana Markdown visualization

The dashboard we created is used by our customers. For layout and the look-and-feel we use several Markdown elements within this Kibana dashboard. I would like some guidance towards layout options for this Markdown visualisation.
Already succeeded in the following:

  • Logo's

  • Links to other sites (such as help and support)

  • Tabel

Not being able to succeed in and in need of some guidance:

  • How to make the tekst colour different?

  • How to centralize text in such a way that the text keeps centralized when making the Markdown element bigger or smaller in the dashboard (it keeps aligning to the left side of the Markdown element) ?