Tongues indicate time-sensitive information related to an offer, a news item or a new development. Examples: “Since November”, “from 12 - 22 January”, “Coming soon”, or “New”. They can be used for the following home page components: carousels, event highlight vignettes, and classic vignettes.
Choosing white or dark text on color is not arbitrary but the result of accessibility study made about contrast between colors.
That’s why we only display the combinations that guaranteed the respect of accessibility norms.