Stats preview card with HTML , SASS

I am not really sure abou the colour of the picture. I put opacity: 0.5 first on the picture so it became darker becasue of the card color which was dark blue and then I added an overlay with a div and I made the background color of that div to the soft violet color which was in the style guide. But I feel like the color is still not right. When I only put opacity on the overlay it was too light. But in my opinion it is still not dark enough. I am actually curious how everyone else did it.