I had a similar issue when I put paint samples on my wall. We were using Benjamin Moore colors though. We originally had a Dijon mustard color (yellow-gold) previously. When I added taupe and greige color samples, sometimes they looked blue. I covered the sides of the sample with white paper and it seemed to help. I also found a piece of baseboard molding not being used and I repainted it the white trim color we now have and painted small samples on it, leaving white gaps in between each color. That made it easier to walk around with it and see the colors in different lights and different rooms. I found the process of picking a greige paint the most tedious color ever! I ended up buying at least 7 different samples to get the right one. We ended up painting Wish by BM. We tried Silver Fox, Thunder (both too greenish), Wish, Revere Pewter (too tan), Himalayan Trek (I really liked this but some thought it was too dark), London Fog, Abalone.

what looks good in one house may look completely diff in yours. The type of light you get affects how the paint will look. If your light is coming in from the North or an east direction, you may get more 'bluer' light. If you use cooler bulbs, you may get more blue. reflections from water, or greenery outside the window can also affect the light streaming in the windows. Painting over one color without priming, MAY affect your end result. Some paints lean towards yellow, or blue or red, etc. Too many variables.

all you can do is research the color to see where it falls on the wheel in relation to hue/brightness, and try out samples on your wall. For instance, Mindful Gray has a LRV (light reflective value) of only 48. It's sucking up a lot of light!

And, it does seem to lean a little toward yellow/green side of the wheel, as shown.

make sure when you sample that your current color isn't affecting the result. If you're unsure, try priming the wall you're sampling to see if there is a diff in color.