Matte gradient plane background 16:9

A simple, flat matte plane occupies the whole image, presented straight on as if it were a single smooth panel, defined only by gentle color transitions and soft lighting; the palette runs diagonally from cool aqua-mint in the lower left to light sky blue and nearly white tint in the upper right, with the blending handled as a continuous shift in hue and value so that no stripes, edges, or curves appear, just a calm directional sweep of color; light appears to fall more strongly from the upper right, making that corner the brightest and most delicate, while the lower left holds slightly deeper but still light tones, and the mid-right area remains especially stable and even, ideal as a quiet background zone; the surface looks uniformly matte and finely finished, with no visible grain or pattern, no blur or softness effects, only crisp but subtle gradients of color and brightness, and absolutely no objects, silhouettes, or text-like markings.