Colour Zinsser all in one

[Thingsthatgo]

I am a Zinsser covert! I am in awe of its powers.
I would like some Zinsser all in one that matches my kitchen tiles to paint the legs of my kitchen table. I found online a huge number of colours I can get, and I nearly ordered some, but when I looked at the number I chose on a different monitor, the colour is, of course, completely different.
What is the best way around this? Does anyone do in-store Zinsser colour mixing?
Can I find an equivalent colour in another paint range (using the colour cards or catalogues) and ask them to make that colour?

I think Brewers decorators centres tint Zinsser. I bet similar trade places will, too. Don't be put off by the idea it's "trade only". People in these places are friendly and I'm sure they'd be able to help.

zinsser is my new favourite- i just painted my front door with the all coat exterior , colour matched at brewers to litlle green portland stone, also dont forget brewers do price match so show the online price from somewhere like paintshed and they will match the price. you can go to brewers and they have colour cards for all paint and you can choose whatever u want

Amazing! Thank you both