Topic: Color attributes with 3 characters?

I haven't done much design lately and as a result, I haven't kept caught up.

Some of the newer sites I've seen use 3 characters for their color attributes instead of 6. What's the dealio?

:::11oh1:::

It's only allowed in CSS, but using 3 hex numbers is a shortcut for 6, like this:

#369 -> #336699

#17A -> #1177AA

It's just shorthand.

Ah, cool Slime. That's kinda what I figured but I thought I'd ask the pros.

:::11oh1:::