How can I add a static prefix to a random string?

[thislooksfun]

I'm trying to generate random hex color strings, so I need something of the form #hhhhhh. I have the latter part working via fc.hexaString({ minLength: 6, maxLength: 6 }) so now I need to prefix it with a '#', but I can't find a way to do so. Am I missing something?

[dubzzz]

Something like the snippet below should do what you are looking for:

fc.hexaString({ minLength: 6, maxLength: 6 })
 .map(s => `#${s}`)