What are the possible themes in a 'black and blue novel'?

Social class can also be a theme. If the girl in the blue dress is in a historical or fictional society with distinct classes, the dress might indicate her social standing. It could show whether she is from a wealthy family or a more humble background. And the story could be about how she navigates the differences in class, either trying to rise above her station or dealing with the pressures of her own class.

Another theme might be redemption. A character who has been through a 'black and blue' situation, like being beaten down physically or emotionally, might be on a journey of redemption. They could be trying to make up for past mistakes or heal from their traumas.

One possible theme could be betrayal. Just like a black widow might be seen as a symbol of betrayal in nature, the novel may explore how characters betray each other. Another theme could be survival, as the black widow is a survivor in its own ecosystem. And secrecy could also be a theme, as black widows are often associated with hidden and dangerous things.

The theme of despair could also be present. A black winter can represent a time of hopelessness, where the future seems bleak and characters may struggle with finding a reason to keep going. The long, cold nights and unforgiving weather can wear down on their spirits.

A third possible theme is identity. The Blue King's identity could be deeply intertwined with the color blue. It could be that his family has a long - standing connection to blue, and he has to struggle with maintaining this identity in a world that may not always understand or accept the significance of blue in his life and rule.

Elegance and sophistication. A black dress with pearls often represents a high level of refinement, so the novel might explore themes related to upper - class society, their manners and social norms.

Love and longing can also be themes. The black dress and pearls might be part of the allure of a female character. A male character could be drawn to her because of her elegance, and the story could be about their relationship. It could explore the idea of unrequited love, where the man is in love with the woman in the black dress and pearls but she has her own motives and desires that may or may not include him.

One possible theme could be adventure. Since it has 'across the blue' in the title, it might involve characters going on a journey in a blue - hued world. Another theme could be music or rhythm, given the 'Four Rhythm' part. Maybe the story is related to the power of music or how rhythms affect the world or characters in the visual novel.

One possible theme could be mystery. The ghostly blue eyes are likely to be a source of intrigue and an unknown element in the story.

One possible theme could be discovery. The blue stones might be something new that the characters discover, leading to a change in their perspective or life.