my interpretation of the song is that it's just saying how love can go bad. "twilight/sunlight fading". or that love/relationships have two sides - "casting shadows in the pale shade of blue". I think perhaps plastic blue is the superficial beginnings of the relationship. the second and fourth stanzas are describing what the relationship becomes after it changes from that initial lovestruck phase - the change being the car crashing/death of light. maybe those two things even signify something more specific like one person in the relationship betraying the other - the catalyst which changes everything and makes the love go bad.
my interpretation of the song is that it's just saying how love can go bad. "twilight/sunlight fading". or that love/relationships have two sides - "casting shadows in the pale shade of blue". I think perhaps plastic blue is the superficial beginnings of the relationship. the second and fourth stanzas are describing what the relationship becomes after it changes from that initial lovestruck phase - the change being the car crashing/death of light. maybe those two things even signify something more specific like one person in the relationship betraying the other - the catalyst which changes everything and makes the love go bad.