???
Did you say, "a web design company?"
The first two mention the word "web" at least.
The second might work.
But remember, the only value of a name is advertising!
Try asking ten people to identify what a particular business does. Then say, "Rainbow7." See if anyone guesses web design.
It is possible over time to build name recognition for anything. "Google" for example, or "Amazon." But it is work. And probably expensive.
BeautifulWebsiteDesigns dot com is not used, but a name like Beautiful Website Designs would be preferrable even if it was not your domain name as such.
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