But what color is indigo? Turns out, that's a big question. A mix of blue and purple — and affectionately known in the Livingetc office as 'blurple' — indigo sits on the color spectrum ...

The colors change as the wavelength increases from violet to indigo to blue, green, yellow, orange, red and deep red. As a light wave's length increases, its energy decreases. This means the light ...

HX said "indigo blue" and "sand" will replace the red and black colors of Hurtigruten, its former sister line.

HX Expeditions has introduced new fleet livery colors “Indigo Blue” and “Sand,” marking a key milestone in the continued ...