Lori, you need to hire a consultant, preferably one with training in color science. Don't be taking colors off the web, they don't even display accurately on a monitor.
First of all, your kitchen materials are going to drive the paint color selection. Someone needs to look at those in person. (or at least see a photo). While color can be quantified scientifically, our perception of color is relative to what it's against. Many warm grays and greiges can be nice colors, but if they clash with your tile/trim/cabinets, etc, they aren't going to look right.
Your light source will also influence the appearance of the color. You mention you changed from fluorescent to warm LED - good. Having a unified set of bulbs helps color not vary so wildly from one area to another. However, color will always look different at night, you can't control that. So what I tell my clients is, aim for a color that looks good on most walls, most of the time.
A good consultant can help you narrow down your choices to no more than 1 or 2 colors. Test them in the same paint brand that you will ultimately purchase. If you are looking at super light colors, you may have to test them in a gallon of the real paint. Often, the formula for light colors doesn't break down evenly into the sample size and therefore it will not render accurately. If in doubt, check the sample paint against the chip before you leave the store. They'll dry it down on the chip for you. Hope that helps! Good luck.
Q
