The female in the first pic is not really showing receptive coloration and definitely not Gravid coloration. She should be displaying a little more color. Maybe she just isn't ready yet.
They male is electric, nice fired up colors on him. He is either showing off or is really pissed.
They are beautiful! I love Carpets so much - I MUST have one of my own! Are they fully grown? Do they live together, or did you just put them together for the photos?? Thanks for sharing the pics - carpets are soo cute!