Indigo is something of a mystery. It sits between the more familiar purple and blue of rainbows. And it’s the elusive center of Catherine E. McKinley’s “Indigo: In Search of the Color That Seduced the ...

Blue may be a universally beloved color for interiors, but it encompasses a vast number of different hues and tones, and that includes the highly complex, hotly-debated, and hard-to-define shade, ...