Retro Birthday Pattern Card

This greeting card features an off-white rectangular panel centred on a patterned background, with “Happy Birthday” set in deep blue, simple sans-serif lettering. A soft shadow around the panel makes it look slightly raised, like it’s hovering above the design beneath. Behind it, repeating geometric shapes—squares, diamonds, and rounded quarter-circles—fit together in a tidy, rhythmic layout that feels like a well-matched pair. The palette mixes petrol blue, mustard yellow, ivory, and muted terracotta, creating a cozy, retro feel that suggests a friendly closeness 🎉. Teal circles sit on top of some shapes, adding layers that read like gentle overlaps, as if the pattern is leaning in toward itself. The main text stays centred on the off-white panel, with the blue letters standing out clearly against the light background 🎂. All around the panel, the tessellated shapes alternate between sharp corners and smooth curves in petrol, mustard, ivory, and terracotta tones.