Geometric Blue Guilloché Design

I need a clean, geometric guilloché pattern that will be printed on my membership cards. The look must stay strictly monochromatic—different blue shades only—so the overall effect feels cohesive and high-end without distracting color shifts.

The size is (85.6mm x 54mm).

Please base the artwork on true guilloché principles: flowing, mathematically precise interlaced lines that repeat seamlessly when tiled. A vector format (AI, SVG, or high-res PDF) is essential because the final piece will be scaled for both card fronts and occasional larger promotional items.

Once we agree on the draft, expect to:

• Provide the editable vector file with layers intact
• Include a small mock-up on a standard credit-card canvas to confirm scale and line weight

If you generate the pattern programmatically—using tools such as Guilloché generators, Illustrator scripts, or custom code—just ensure the curves remain editable so I can adjust stroke width if needed later.

I’ll review the first iteration for overall rhythm, line clarity at 300 dpi, and color accuracy against a supplied blue reference swatch. After approval, a final pass to polish any tiny line gaps will wrap the project.