Some colour grading screen grabs and words about them.
Original Shot
Grade 1: Boosted brightness and contrast, and injected a bit of cyan in order to emulate an overcast morning.
Grade 2: Added yellow midtones and boosted highlights. Also brought down the brightness and contrast. Trying to evoke a ‘flashback’ or ‘old-timey’ feel here.
Original shot
Grade 1: Slightly boosted brightness, contrast and saturation and added some purple midtones to give the image some more overall vibrance and colour. 
Grade 2: Lowered saturation and added a blue tint to give the image a gloomy and dreary look.