retro abstract poster. vintage 1960s inspired geometric s of colors of the year - ultimate gray and

abstract design vector template background modern art graphic shape cover layout trendy contemporary flyer geometry element collage futuristic book brochure corporate post blog cool dot paper social curve flier advertising blank scandinavian conceptual placard spot creativity elegance leaflet office stylish minimalistic gray yellow grey retro mid century style poster vintage 1960s inspired geometric shapes pantone 2021 colors ultimate illuminating minimal covers flyers cards cardscolors year pantone2021