Mixing Dulux and Valspar water based paints

[DIY-guy]

Hi
I've bought Valspar Trade Walls and Ceilings Tough Matt paint, tinted with Blueberry Ice from B&Q - https://www.diy.com/departments/val...prd?colour_name=Blueberry+Ice&hex_code=d6e2e8 and after painting the corners and edges in the room the colour looks much darker than on the paper sample.
So I'm thinking of mixing it with a white paint to dilute the colour. I could just get another can of the same paint in white from B&Q for mixing. But it's an expensive one (£42 for 2.5l) and I already have more than I need (needed about 3l so had to get 5l can for £60). So I'm thinking of mixing it with white Dulux Trade Vinyl Matt, which I have some spare - https://www.screwfix.com/p/dulux-tr...GQEYjoAeLa-ioP0TeVgaArKgEALw_wcB&gclsrc=aw.ds
My question is, can I actually do it without ruining all the paint? They are both matt, water based emulsions, so I assume it should be fine, but would like to hear a professional opinion. I understand that the original Valspar paint attributes (toughness etc.) might be slightly compromised, but I don't mind too much.

Any help or opinion would be greatly appretiated.
Thanks

 

[lostinthelight]

Compatibility aside, have you tried blending a small sample of the two paints to see if you achieve the desired colour

 

[Wayners]

Paints can not mix very well with the different resins. It's not recommended however you can buy paint pigment online from eBay or other and adjust.
It's an unknown mixing colours yourself.
I'd just go buy what you want

 

[DIY-guy]

Compatibility aside, have you tried blending a small sample of the two paints to see if you achieve the desired color

I could try that as well. Thanks