I remember in "Blood Cadets" by Simon Fraser (in Brothers of the Blood collection) we see BOTH Joe and Rico without helmets.
Although they're just fresh-faced primary-school aged boys. Dark hair, so clearly Rico's ginger hair is a result of his Titan-stretch. Don't remember the eye colour. Not that it matters, Joe's got bios now anyway.
And yeah, none of that stuff DDD mentioned has been picked up since. Besides, Dredd's been dropped in acid and burnt like hangover toast and had a rejuve so he's not so crispy anymore - it can't possibly make any sense that Dredd's so-called deformity is WORSE than that.