I went to Sherwin Williams first, and the guy was hesitant to match

It all depends on the color. Some colors cross brands flawlessly. Some don't. And that's not just my opinion. We can pull data to prove it.

It's a mistake to say that you can have any color matched in any brand as much as it's wrong to say that you NEVER can cross brands with any color - sometimes it works, sometimes it doesn't.

I'll tell you exactly how I deal with this.

The only way to know for sure is to buy a sample of Clunch directly from F&B, paint a sample board and have SW use that real-paint sample as the target for matching. F&B paint chips are notoriously "off". Which is why you have to buy a sample. Any other brand and you could use the chip - but not Farrow & Ball. F&B has issues and this is just one of them.

Then buy a Color Muse - you can pick one up right at the SW paint counter because they sell them with Sherwin Williams branded stickers. It will be $50 or $60 well spent.

2. Follow the directions to connect the device and calibrate it.

3. Find and Choose "Inspect" it's a triangle icon. On my phone it's in the lower left corner.

4. Tap "options" and from the choices of Inspect Options, choose "d65 Lab".

5. Tap "options" again to close that menu. Now you're ready to scan.

6. Take the cap off and put it on the button end.

7. Place the device scanner eye end directly on your painted F&B color sample.

8. Tap the big "Reference" square on the app. It has a finger tapping a button icon.

9. Place the device scanner eye end directly on a DRY version of the Sherwin Williams draw down sample of their attempt to match Clunch. Do this right at the counter in the store.

10. Tap the big "Sample" button. It too has a finger tapping a button icon.

11. The app will compare the two colors based on their color DNA and it will tell you in terms of Delta E if it's a good match or not.

It looks like this...

A Delta E below 0.5 is a really good match. I would buy the paint.

A Delta E below 1.0 is going to be decent, usually close enough for most people.

A Delta E above 1.0 and it's a matter of settling and deciding that the match is good enough and you'll be happy with it.

IF YOU HAVE THE DATA THAT PROVES THE STORE CANNOT MATCH YOUR TARGET REFERENCE COLOR THEN YOU ARE NOT OBLIGATED TO BUY THE PAINT.

They all understand D65 Lab color data values and Delta E differences.

Using the device and the data is VERY different than standing there and just saying "you don't like the color and you don't *think* it's a match". If you have the data, everyone KNOWS if it's a match or not and there's nothing to discuss or debate - it's either an acceptable match or it's not. Period.