Indigo Blue — Indigo Blue is a distinctive shade whose name reflects its overall visual character. It belongs to the Blue family: a dark, vivid tone with hex code #3A18B1 and RGB values of 58, 24, 177. Its dominant channel values give it a cool undertone that reads as vivid rather than flat. Indigo Blue pairs well with crisp whites and warm neutrals and works nicely in branding and logo design. Nearest neighbors: cobalt.