The Google Apps Script guide below implies that header text can be colored.
When I try using some HTML tags (such as <span color>), any of them actually worked.
Which tag should I use to implement this?
UPDATE
The following is my code to implement the section header. The <b> tag pair works, but any attempts I made to apply color failed.
CardService.newCardBuilder()
.addSection(
CardService.newCardSection()
.setHeader('<b>header text</b>')
)
.build();
The Google Apps Script Card reference doesn't include much about how to handle the Card design but the Google Workspace Add-ons site points to use the G Suite Addon Design Kit.
Regarding the use of HTML the supported tags only a few. To assing a font color use something like this:
CardService.newCardBuilder()
.addSection(
CardService.newCardSection()
.setHeader('<font color="#ea9999">header text</font>')
)
.build();
References
Resources