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illustration-one-line

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Draws original hand-written SVG spot illustrations in the One-line style, joyful action figures doing design and coding work. One continuous uniform black line (2.3 px at 480 wide) loops and doubles back to draw the whole figure. Flat coral, periwinkle and white patches sit behind the line, wobbly and deliberately knocked 2–6 px out of register like a misprinted riso. Tops carry coral stripe lines, and there is no ground plane, only a squiggle, a curl or a few speed strokes, all on warm beige paper. Covers the palette, a route-building toolkit (tube limbs, hand and shoe loops, wobble patches, masks), poses, composition and a render-critique loop. Use when asked for one-line, single-line, continuous-line, misregistered, riso-style or playful doodle illustrations, for empty states, onboarding, 404 pages, blog headers, feature spots, launch announcements or marketing cards.

agent-skills/illustration/illustration-one-line/SKILL.md

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Last checked
Nov 9, 2026

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Repository last updated
Nov 8, 2026
License
MIT

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# Illustration: One-line

A loose, energetic style: a figure in mid-action drawn as one long wandering black line, with colour laid underneath as offset patches, as if a second print colour slipped. It suits upbeat product moments (launches, sprints, flow, celebrations) where an interior scene would be too heavy.
Use `illustration-halftone-line` for black open line with dot-screen tones and no colour. Use `illustration-ink-sketch` for a wobbly brush outline around a cute critter. Use `illustration-two-colour-brush` for thick brush outlines with solid black shapes and one mint ink.

Extracted from a set of 42 original design-and-coding cards in 14 styles; the three cards in examples/ are this style's shipped cards.

## The look in one sentence
One continuous black line draws the whole figure, and flat coral, periwinkle and white patches sit behind it, deliberately knocked 2–6 px out of register.

## Palette
Measured from the three examples (1x renders): paper 87–89% of the pixels, ink about 2%, white patches about 3%, periwinkle 2.3–3.7%, coral 0.8–2.8%.

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