If you're interested in an 07, then interior color is kinda married to exterior color, unlike in 06. Color Combos for 07:
Slate Gray - Diamond Gray Metallic, Newport Blue Pearl, & Titanium Silver Metallic
Desert Beige - Harvest Gold Metallic, Obsidian Black Pearl, Satin White Pearl, & Seacrest Green Metallic
Living in New Mexico, we wanted a light color exterior with a light color interior (actually wife mandated the Desert Beige :lol

so we ordered Harvest Gold.
BTW, living in La. & now NM, heat buildup has always been an issue for me. I find that if I open rear windows an inch or so when I first start the car, the AC helps push the hot air out and enables the car to cool quicker. Then close 'em when it starts to cool down. JMO.