Thanks everyone - some great advice and feedback here, and I really appreciate it!
Claire - interesting points. The pair that I wore into the ground last summer could be characterized as "Jesus" sandals, but I'm not sure? Just plain brown every-day sandals - but they worked with denim skirts, more casual skirts and a lot of my shorts. But like I said, I actually had to throw them out at the end of summer - I'd totally wrecked them.
I also had (have) a pair of fabric wedges that are insanely comfortable - they've seen better days, and I'm thinking I might replace them, because even though they have a slight heel - they are incredibly comfortable and work well with my very casual summer wardrobe. I get 'thrown into' dressy situations at the last minute, but I am covered when it comes to those kind of shoes. I am not covered when it comes to casual, everyday sandals for summer at all - in fact, I'm wearing these horrible cheap-o flip flops (not in public, just around the house) that I bought a couple of weeks ago when the stupid powder pink things the nail place gave me broke long before I'd made it to the car. (could use an embarrassed face smilie here). In my defense - these are the first pair of flip flops I've owned since I was about 12?
Kate - thanks for the suggestion of olive - I can totally see that working too - I'll look.
Ok - so black is out. Unless they're more delicate looking, but then...I'm pretty sure I have loads of fancier/dressier sandals. Way too many, even. They come in handy, but they aren't my everyday summer sandals that I can wear with shorts and denim skirts etc.
Still waffling on the gold. But then, I'm kind of chicken when it comes to something new.