White transparency not the same between URP/Lit and ShaderGraph/Lit

Unity Engine
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1

When I’m using the default Material URP/Lit with a Color #FFFFFF and 35 for Alpha I have a nice transparant white render.

9807831--1408434--upload_2024-5-1_13-13-13.png
9807831--1408434--upload_2024-5-1_13-13-13.png611×841 45.3 KB

9807831--1408428--upload_2024-5-1_13-12-46.png
9807831--1408428--upload_2024-5-1_13-12-46.png788×628 629 KB

Now I try to reproduce this in a very basic URP ShaderGraph Lit (with the same color), I have a gray render no so transparent.

9807831--1408440--upload_2024-5-1_13-15-49.png
9807831--1408440--upload_2024-5-1_13-15-49.png1199×833 72.7 KB
9807831--1408449--upload_2024-5-1_13-16-51.jpg
9807831--1408449--upload_2024-5-1_13-16-51.jpg1199×833 405 KB

I tried to make it even more transparent but it turn black (alpha 10) And with alpha at 100 it’s “white” (still gray) but not transparent at all

9807831--1408464--upload_2024-5-1_13-21-30.png
9807831--1408464--upload_2024-5-1_13-21-30.png801×588 577 KB

How can I acheive the same result between URP/Lit and URP ShaderGraph Lit ?