Help - paint matching

[SafariSurnise]

We have a new kitchen - Second Nature in Copse Green and I would like to paint the walls around the units in the same colour.
I have contacted the retailer to get the RAL colour code but apparently SN don't share this information.
The colour is somewhere between green and blue and it looks different in different light. Inchyra Blue from F&B looks similar on screen, yet a bit lighter and not quite exactly the same. Sherwood Forest from Valspar comes quite close but heard so much negative feedback about Valspar...
Have been thinking of taking a piece of plinth with me to Dulux and getting it colour matched but scared it will be too different as the colour really changes a lot during the day -sometimes it's dark green, then other times it's more dark teal.

Any advice/experience? Anything else that I should consider or try to do?

Bump

Unfortunately Second Nature aren’t in the drop-down list, but is something like this of any help? I used it successfully for a Farrow & Ball match.

Failing that, can you take a door sample/off cut of plinth in to one of the DIY sheds and ask them to scan and colour match that way.

Do you really want the walls the same colour as the kitchen? Will it not feel closed in or oppressive? Have you asked Second Nature whether they can supply you with paint?

I actually haven't asked them...I have paint for touching up the doors but it didn't even occur to me that they may have wall paint as well. Will ask, thank you for the advice!

And yes, I do want the same colour. It will only be around the units so two walls. The rest of the kitchen will have a different vibe. I hope it works the way I see it in my head! :)