I mean cover the majority of the street in that color. The second color (i.e. the current color of the street) could be darkened with the color of the sky -- but it would need to be much darker than it is now if this is to be a night scene. The street color right now reflects a particularly light sky. It comes across as cloudy, but the sun is just hidden at maybe around sunset (due to the brightness of the street's current color compared to the darkness of the shadow coming from the building -- so, thinking on it that way, the street color might actually need to be darker than the building's current 'shadow' color since the 'shadow' isnt really a shadow but a reflection of the building's basic color on the street).