Zaffer (Color Guild) — Zaffer (Color Guild) is a vivid blue-green shade, capturing the vibrancy of zaffre pigment used in Victorian-era stained glass. It belongs to the blue-green (teal) family, which is a shade of blue-green that sits between blue and green on the color wheel. This color has a high proportion of green and a significant amount of blue in its RGB values (41, 174, 180).