Is the blue a blue or is it turquoise

Mint is made by mixing the correct amount of blue, yellow, and white, where there are no hues of the blue or yellow. Turquoise has a blue hue. Jadeite has a yellow hue. These trivets do not have hues of blue or yellow.

Any chance you might offer these in black or brown to mimic wrought iron? I would buy these right now but these bright colors are awful for my decor.

Hello Bad 'Ol Kat,This is a update answer, we have contacted the factory and we decide to update the black trivet in the future, maybe half a month. You can take a care and i will reply you again when we update the black color in the future.Have a nice day!ME.FAN Team

Are these mint green more of a jadeite green? or a turquoise or blue like my screen shows?

Mint is made by mixing the correct amount of blue, yellow, and white, where there are no hues of the blue or yellow. Turquoise has a blue hue. Jadeite has a yellow hue. These trivets do not have hues of blue or yellow.

Can you safely use these underneath slow cookers/crock pots to protect countertops?

I haven’t used mine for that purpose but slow cookers generally run between 200-300 degrees and I’ve taken casseroles and other things out of the oven at 350-425 degrees and they’ve stood up well to those temps so I’d hope they’d work with slow cookers. However, my two slow cookers have feet on them that clear the counter already so they would not help unless your crockpot is in direct contact with your surface.