关于紫色心情的英文文案，可参考以下表达：

神秘与忧郁

The mysterious purple always brings me the most solemn melancholy.

温柔与宁静

Purple whispers of tranquility, a hue that soothes the soul's restless whispers.

浪漫与梦幻

In the realm of dreams, purple reigns supreme, a color that weaves enchanting tales of love and longing.

淡然与优雅

As time fades, the intensity of purple softens, revealing a serene beauty that transcends the ordinary.

力量与神秘感

Purple embodies a powerful aura, a color that hints at untold stories and hidden depths.

以上文案通过不同角度描绘了紫色与心情的关联，可根据具体场景选择使用。