Business Card Back with Texture

I was advise to try out textures be hide my
Logo so I have tried a few versions below 

Original Background with just gradient

Background with water colour texture

I like the texture on this but I don't think the colour works

Background with water colour texture

I like this one better than the one previous due to it been darker in colour

Background with water colour texture and concrete texture

This one is darker again than the one previous I like that but i don't think the textures are as strong