I'm trying to find a Medium (not too dark, not too light) Grey exterior paint that doesn't have blue, green or brown undertones. Does one exist ? When it comes to architectural color, there is no such thing as undertones so you need to think about color differently. Every color belongs to a hue family including whites and grays. Here's an example of what that looks like. There's nothing hidden or "under" anything. You don't want blue, green, or brown. That means you should be looking at grays from the yellow to green-yellow hue family. The reason is grays, near neutrals, from this region of the hue family spectrum are most often perceived as being "just gray" with no discernible factor of hue. You are using Dunn-Edwards. Excellent choice. Dunn-Edwards is one of the few paint brands that lists a Munsell hue, value, chroma color notation in its fandeck. Get one of their fandecks. Another example of where to find Dunn-Edwards color notations --- try this, Google "Muslin DE6227 LRV" and you'll see the color notation is included in the meta data. Handy. All you have to do is look for grays with a hue family designation of Y or GY. Here's what that looks like. A gray with a hue family around 5Y or 6Y is a good place to start. Make sure the last number (with the hot pink arrow) is below 1.0 - this is chroma and the lower the chroma the more likely the color of gray will appear "neutral".

Lazy Gray by Sherwin Williams will work , It has warm blue undertone.

Best gray paint with blue undertone for basement

Definitely take a tile sample to the paint store, but after you pull some chips, look at the colors in natural light. They have LED or florescent lighting in paint stores that is unlikely to be similar to the light in your home. Also look at the chips on a piece of copier paper so you're not distracted by a background color. Then get samples from Samplize.com or from the paint store to view in the light in your house next to your floors and anything else the wall color will be next to. I also use Simply White for trim so I think it's a good trim color. Gray-blues are going to be cool colors, so try to lean warm when you're choosing. You might be better off just using Simply White like the rest of your house.