Ah, nice, this was a request of mine too. :)
It's still a little hidden IMO. I feel like it should be a universal (optional?) box below the colour menu. It's tremendously useful to be able to cut and paste specific colour values, even if you're not doing web development.
Speaking only for myself, I like to see this even when working in HSL or other modes. The different modes are just different ways of creating the colours I want, and the hex value is just a convenient way of transporting that information.
Also, if possible, it'd be nice if it supported RGBA (alpha) values.