A concentric color wheel radiates outward from a central triangle, mapping the full spectrum in graduated bands of red, orange, yellow, green, blue, and violet against a weathered cream ground. Fine radial lines and delicate text annotations circle the composition, creating a scientific yet meditative visualization of color theory that feels both historical document and abstract study. Printed on smooth white card stock and made to order, artwork on the front, blank inside, envelopes included in every set. A handwritten note that arrives as an independent artist's work.