Allow Tabs to be Formatted
Currently, we cannot format for the form tabs. This would allow for the fonts used on those tab labels to be the same as the ones we use on the form.
Style Profiles can be used to change the colors on tabs, and watch for the coming feature to add custom CSS into Style Profiles, releasing later this year for both K2 Five and K2 Cloud. You will be able to link external CSS files into your Style Profile to use in SmartForms, which should unlock this capability. Try it out when it releases and let us know your feedback. Thanks!
Rob Nicholas commented
Add on - would love to be able to customize the font color in tabs as well. Some of the combinations are kind of hard to read right now, especially if you change the form background color.