Design a vibrant marketing poster background featuring a gradient blend of warm colors like orange, red, and yellow that transitions into cool blues and purples at the edges. Include abstract geometric shapes in varying opacities, overlapping each other to create depth. Incorporate subtle texturing, like a light canvas or paper effect, to give the background a tactile feel. Add faint outlines of silhouettes representing diverse people engaging with products or services, ensuring they are semi-transparent to keep the focus on the promotional text that will be added later. Make sure the overall atmosphere is energetic and inviting, perfect for capturing attention at a promotional event.

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Design a vibrant marketing poster background featuring a gradient blend of warm colors like orange, red, and yellow that transitions into cool blues and purples at the edges. Include abstract geometric shapes in varying opacities, overlapping each other to create depth. Incorporate subtle texturing, like a light canvas or paper effect, to give the background a tactile feel. Add faint outlines of silhouettes representing diverse people engaging with products or services, ensuring they are semi-transparent to keep the focus on the promotional text that will be added later. Make sure the overall atmosphere is energetic and inviting, perfect for capturing attention at a promotional event.