Understanding Nuanced Contextual Meaning

In the novel, the protagonist reflects on their childhood, saying:

"It was a time dominated by the hues of innocence, where laughter echoed through sunlit fields, and every worry seemed an alien concept. But as the years unfurled, the tapestry of my life became interwoven with the shadows of reality, and I glimpsed the nuanced complexity of adult existence, transcending mere black and white into a spectrum that left me occasionally bewildered."

In this context, the underlined word 'nuanced' most nearly means: