Brand & identity

We share curiosity, clear explanations and room for individual differences. PurrJung keeps its own name, watercolor artwork and warm visual style. OpenJung’s Cats appearance explores human personality playfully; PurrJung helps caregivers observe real cats. Brand affiliation does not change either project’s data or licensing terms.

PurrJung is one word, with a capital P and J, in every language. Use purrjung.org in public links. Keep OpenJung’s capital O and J in the parent credit.

The 16 types are a creative framework, not a validated animal classification or a veterinary assessment. Allow for unobserved behavior, results that lean neither way, and change over time. Avoid claims of diagnosis, guaranteed compatibility or open-source availability for this project.

Meet Ruby

Ruby is a white curled cat with rounded ears and back, a wrapping tail and a small red nose. This calm visual form is our symbol; it does not classify a real cat’s personality.

Use the rounded Ruby symbol with the PurrJung wordmark. Ruby is a geometric brand mark, not a watercolor portrait or a substitute for appearance and type portraits.

• Use the white-and-red mark on a warm-stone background, or the ink monochrome mark on a pale background.
• Leave at least a quarter of the icon width as clear space around the logo. Do not stretch, recolor, outline or shadow it.
• At 16–32 px, use the supplied compact favicon instead of shrinking detailed portraits. Keep Ruby red local to the mark; it is not a new warning or action color.

Warm paper. Grounded color.

Friendly headlines, clear reading

Nunito 800 gives the wordmark and headlines their warmth; Sora 400–600 carries body text and controls. Both Latin families are self-hosted. Use appropriate local-script fallbacks, comfortable line spacing and readable contrast.

Sunny Room gives the home page a band of butter yellow; elsewhere the watercolor cats sit unframed on warm paper. Actions use pill-shaped buttons. Content is grouped with thin lines rather than boxed in cards, which are kept for things you operate. Long reading stays on warm paper with generous space, and cats stay whole. Touch targets are at least 44 px, keyboard focus is visible, and reduced motion is supported.

Topic-entry icons use simplified, softly rounded object shapes with one quiet secondary color plane. Action icons use consistent single-color lines. Keep both separate from watercolor scenes; Ruby is the brand mark, not a replacement for functional icons.

Portraits and scenes use natural-proportion storybook watercolor: believable adult cats, transparent washes, sparse light-brown pencil outlines and warm ivory paper. This editorial style does not apply to the abstract Ruby logo.

• Keep the subject complete, with at least 8% breathing room. Preserve the ears, eyes and useful scene details.
• Keep names, codes and captions outside the bitmap. Distinguish the Ruby symbol, type portraits, appearance avatars and editorial scenes.
• Avoid toy-like proportions, oversized glassy eyes, fantasy coats, costumes and badges. Coat color or breed never determines a personality result.

Warm, curious and specific, like a thoughtful cat-loving friend. Describe what someone can observe and what they might try, while letting the cat choose distance and participation.

Clearly label fictional scenes. Separate observation suggestions from research claims, and explain uncertainty without judgment.

How observations work →

Current Ruby mark exports and social artwork used on the site. Keep the geometric symbol distinct from watercolor editorial art, and preserve each asset’s proportions, colors and intended background.

• Ruby color SVG mark

  SVG
  Download ↓

• Ruby monochrome SVG mark

  SVG
  Download ↓

• Ruby app-icon SVG

  SVG
  Download ↓

• Browser icon PNG

  PNG · 96 × 96
  Download ↓

• Favicon ICO

  ICO · 16 / 32 / 48
  Download ↓

• Apple touch icon PNG

  PNG · 180 × 180
  Download ↓

• Social preview PNG

  PNG · 1200 × 630
  Download ↓

Use these files to introduce PurrJung with its OpenJung credit and a link to purrjung.org. Availability for download does not grant a new license to the artwork, fonts or project source. Do not imply a separate partnership or endorsement.