The crux of Indigo by Alice Melvin lies in the journey of the protagonist, a young girl named Indigo, as she explores her imaginative and introspective world. Through the book, the color indigo becomes a central motif, symbolizing a connection to creativity, wonder, and personal reflection. The story invites readers to engage with the concept of color not just as a visual experience, but as a gateway to deeper emotional and sensory discovery.

Indigo's journey is marked by a sense of exploration—both external, as she encounters various shades and interpretations of indigo, and internal, as she contemplates her own place in the world. The book’s non-linear narrative, combined with Alice Melvin’s evocative illustrations, encourages a meditative and personal interpretation of both the character’s experiences and the symbolic meaning of the color.

In essence, the crux of Indigo is about embracing curiosity, the joy of discovery, and finding beauty and meaning in the smallest details of life. It encourages readers—especially children—to open their imaginations and explore the rich possibilities of their inner worlds.