I'm using a screen resolution of 1600 x 900 on my laptop and the content of the website is all below the fold. I think that's too much, having to scroll down to see even a single line of text.

I too think the colours are too dark. By all means use the colour of olives as a contrast, but I think to use it as your base colour is too dark. It's a mechanical, industrial colour and , for me anyway, doesn't invoke the wholesome, sun-drenched feeling of olive trees in full fruit.