TrueType fonts exist as single-color outlines in your computer. As many logos began life as a TrueType font, you may want to use one as the basis for your design. There are many free-to-use fonts available on the internet, although some require payment if you use them. Check the font’s license to be sure, especially in commercial circumstances. For this purpose, let’s assume you have either permission or freely licensed fonts.
When you select text in a given font, the computer provides that in outline form. Each outline is given as an object. For example the lower-case letter ‘i’ will usually have two objects; one for the dot and one for the stroke. You can use these outlines as stitch types anyway you want. You can make them outline designs by applying a run, or you could use the art for satin stitches. You could even make them huge and set them to a fill, cross stitch or applique. It’s just a piece of art as if you had drawn it yourself.