Only your two colors are used (no gradients) on a white background. Tap Random 2 Colors or a preset pair for a quick choice. Every New Design is a different seamless tile and never repeats one from this session. All strokes are exported as filled outline shapes. The preview shows one single tile; Repeat Preview 3×3 shows it repeated.
SVG is exported as filled outlines (no strokes), black background, white shapes.