Years ago I had a pair of the classic El Nat "Yggdrasil" clogs in bright green, and have contemplated replacing them, but they just feel a little too crunchy/boho to me now, so maybe these are my alternative.
I'm perfectly happy with the black, especially with the pop of white in the sole. I tried the olive as well (in a different size that didn't fit), but it was a bit too yellow/brown and looked weird against my skin. I contemplated the red, too, but already have red espadrilles and chukka boots, and have certain outfits that don't work with red/burgundy footwear so don't want to add anymore right now. I always come back to black for footwear -- it's the most versatile color in my wardrobe, anchors outfits that consist of mid-tones, and it bookends my hair.