We are here to watch two souls fall in love. The main focus is love and nothing else.
Throughout the conversation, Kechiche's close up shots take up about 95% of the scene (and the film in general). The close-ups of the characters' faces gives an intimate feel. It makes the audience feel like we are there, we are one of them. We see the forehead wrinkles, the curious eyes, the flirty biting of the lip, the messy fly-away hairs, the nervous spit-swallows. Everything. Every gesture contributes to the nonverbal communication. Nonverbal communication is often more revealing that verbal because it occurs through instinct while verbal communication is most often premeditated. We know the two girls aren't putting up a facade. We know exactly what they are thinking and how they are feeling- we think and feel with them. The raw close-up footage highlights the realistic situation. The mutual admiration of the two characters is clear and natural. So natural in fact that it appears like a work of art. Any still frame would capture a beautiful photograph encapsulating raw emotions. The feeling of love, pure love, is completely captured in each revealing close-up. Our only focus is on love and not on any extra superficial factors. .
Furthermore, in addition to the actual word "blue" popping up in the title, the color itself is omnipresent throughout the film- especially in the "sketching in the park" scene. Emma's hair, jacket, and eyes are blue. Moreover, the establishing shot reveals the scene's enormous blue backdrop: the sky. So what is the purpose of this color? The color blue is gender neutral, and technically speaking, a cool color. Cool colors have a reputation for evoking warm and soothing feelings. Therefore the "blue" theme invites the viewer into the scene. It makes us feel welcomed and comfortable. Kechiche succeeds at putting our defenses down, whether consciously or subconsciously, and before we know it we are part of the scene.