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I'm no help, having a dickens of a time choosing colors, myself! Depends on lighting, what else is in the room...argh!

All colors belong to color families. True neutrals exist, but your light, reflected light, and surroundings affect how they look. Find a COLOR that looks good with your other choices. Gray is overdone.

I want to paint my kitchen a very light grey. Is there a grey or even a white that doesn’t have an undertone.

Paint colors don't have undertones.

The samples ive tried have looked green,lilac, blue and tan.

All paint colors including colors of white and gray belong to a hue family. If you're seeing green, then the color likely belongs to the green hue family. There's nothing hidden or under anything.

Also, if a near neutral gray that looks "just gray" on the chip but looks lilac in your space, then it's a matter of lighting and other contents of the room influencing how the color appears.

Near neutral, light grays that belong to the Yellow and Green-Yellow hue families are more likely to look "just gray" or truly neutral than near neutrals from other hue families.

For example, Tundra from Benjamin Moore. Grab a chip and be sure to test in your space. Because it is low in Chroma and so near a true neutral gray, it's a weak color. And weak colors are easily influenced the the inherent light sources and other contents in the space.

We can better help you if we know the context of the color and choices.

One of the most common mistakes I see is when people are looking at a neutral on a wall that is another neutral and say - it looks too blue or too yellow or too xxxx.

When I am painting and I want to create the color gray I mix two complementary colors together, so a true neutral gray really an equal amounts of all colors. If it looks a little purple, I add a touch more yellow, if it looks too green I add a touch of red.

When you place that mixture of all colors in a room with another color or neutral it is going to look different than if it were in a room with other colors.

Here is an example of a neutral gray and a beige against different colors. The gray and beige boxes are all the exact same color, only the background is changed.

So the first thing you need to do is isolate the colors that will be staying and ignore the colors that will be eliminated when you paint.

My favorite method for picking a neutral or white is to first take all of my colors that are going to stay outside on a clear day around 2:00 in the afternoon. It is the perfect full spectrum light to see exactly how the colors, whites and neutrals will play together.

The picture below was my color selection for my own home. 2nd color from the right you see two different taupes. They looked almost the same inside my home, but I can guarantee that had I picked the lower color and painted a full wall it would have gone pink.

The other thing you must know is that no one can tell what a color will look like on a 2" square sample. Especially with whites and neutrals. You need a large enough sample to really see the color.

First make sure your lighting is right I use LED bulbs in 4000K to keep colors true at night. I have Vancouver Dayfrom C2 in my whole main living space it is a very light gray with no “undertones” . Everything you have in a space has an effect on color that is why IMO the best is to paint large poster boards with test colors do 2 coats and then move the boards around the space at different times of the day. I happen to still love gray I am more drawn to cool colors than warm so gray suits my space very well.

I had a very hard time with the gray paint for my cabinets (SW color done by cabinet manufacturer as a standard color) and the wall paint. In certain lights, it went pinky/mauve.

I finally got SW to give me the formula and sure enough it had a small dab of magenta in it. I had them leave it out of the wall paint and make it 1/2 strength and I used very bright white for the trim. Voila! No more pinky/mauve! Color was SW Repose Gray.

Patricia Colwell Consulting, I have found myself loving C2 neutrals. The quality of the pigments and number of pigments used really seems to help minimize unwanted undertones.

@Anglophilia we just bought repose gray at 50% for our walls too! It seems like the perfect gray, we had about 6 samples we tested.

https://www.sherwin-williams.com/homeowners/color/find-and-explore-colors/paint-colors-by-family/SW7044-amazing-gray