Its impossible to match something like that from a monitor. You are best to pick up paint chips, and hold them on it, until you find a match.

Get a Color Muse or NIX and measure it. Takes less than 20 seconds.

The result will be a range of whites that align with the stone and you can choose which one looks the best to you.

Thank you. What is a color muse or NIX?

Color Muse and Nix are ultra portable color measurement devices. A smaller scale instrument like they use in the paint store.

Download the app - which is easy to use. Scan your target color and the app will search the database of major brand's paint colors and tell you which color is the closest match.

There are other uses for these devices but a virtual fandeck is the basic application.

To do this the analog way, you'd have to buy a fandeck because paint stores aren't lending them out right now and even when the few that do lend them out are doing so, aimlessly flipping thru a fandeck is not an effective approach to find a color match.

And if you want to search more than one color collection, you have to buy all the fandecks.

The apps for the devices can search a color library of thousands of paint colors from every major paint brand you can name in a matter of seconds.

A device you can use to match colors--

https://colormuse.io/color-muse.html

It's actually called a keystone. I agree to grab some white color chips and start there.

Ack! You are right. thinking about my mother’s delayed memorial. Keystone. Thanks for the correction.

@lynartist I would like this to be the color I use throughout the inside of the house.

Ok, I was afraid you were going to paint it! Matching this small exterior element to transition to your whole interior space may not be practical. Try to find an off white that captures the essence of that piece that also works well in the light inside your house. Don’t get so hung up on the actual color of the piece itself.

I have to say that color might not even look the same on the interior of your home. The light will be different IMO save yourself a hassle and find a white you like for your interior. Get poster boards choose 3 whites you like paint the boards with 2 coats and move them arounf the house to see how they look at all times of the day. That is really the only way to choose colors.

Benjamin Moore's decorator's white, white dove and cloud white are very popular whites to consider. Use matte finish for the walls, satin for the trim and flat for the ceiling.