Light Blonde Hair Spray

I am very light blonde with dark roots. And I was looking for a product to camouflage my roots. And I came across the Magic Retouching by L'Oréal. Thinking he was great and he was going to be able to camouflage my roots. But unfortunately the rendering is not there. It is rather a very yellow blond at the roots and does not camouflage too much. For me it's a little flop.

Translated from French by AWS