What if I want to use red text?

Two options:

Insert an HTML card to replace that paragraph.

Restyle some combination of underlined/bolded/italicized text to be red instead - the example below applies to bold and italic, but you can choose a different combination.

<style>
strong em, em strong { /*listed in both order so that you don't have to apply them in a specific order in the editor */
    color: red;
    font-style: normal; /*these turn off the italics and bold*/
    font-weight: normal;
</style>