(Really) dark blue paint

[volevole]

Would you please recommend any really- really - dark blue paint for kitchen cabinets? I am looking for a really dark effect and we have already tried Little Greene Hicks Blue and also several Johnstone's decorating colours without success (without adding black).
I am really struggling to get this done... thank you much! #stressedofTeddington

Little Greene Plimsoll?

Hague Blue?

Stiff key blue if Hague blue is too dark

[waves - also from Teddington]

Farrow and Ball Railings is v v dark blue - almost black. They also a colour called Blue Black which I think is blacker.

Thanks all! @Ketzele I think Railings is the key, probably to mix with Hague blue @springmachine which a reviewer on the F&B website did to get the effect that they wanted... it also looks like Dock Blue from Little Greene might work. Unfortunately I don't think they do Plimsoll anymore @bathildab as I couldn't find it. I really welcome other suggestions where I wouldn't have to mix paints. Thanks so much!

How light is your kitchen? Hague Blue can look very dark in certain lights and quite vivid in others - it has a teal undertone. If you want to avoid mixing, what about Black Blue?

(www.farrow-ball.com/black-blue/paint-colours/farrow-ball/fcp-product/100095)

Thanks so much everyone. After another £15 on samples, all of which I tried in the store to save further frustrated 'back and forths' it turns out that Basalt from Little Greene is just about right with no mixing, even though it is a little lighter than I had planned. Thanks again.

I almost went for Basalt for our living room but prefer the quality (and price!) of Dulux. I went for Cobalt Night in the end which is very similar.

The tester looked nothing like the end result though! The tester came out pretty much black whereas the actual colour is a very dark blue/grey.