# #13b4ac

A color — vivid. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#13b4ac`
- RGB: rgb(19, 180, 172)
- HSL: hsl(177, 81%, 39%)
- OKLCH: oklch(0.695 0.118 189.1)
- Relative luminance: 0.3576
- Nearest named color: lightseagreen (#20b2aa, Δ 0.571) — https://brandsweets.com/colors/lightseagreen
- Moods: vivid
- Page: https://brandsweets.com/colors/13b4ac

## Tints & shades

- Tints (toward white): #16d0c6, #1de7dd, #39eae1, #54ede5, #70f0ea, #87f2ed, #a3f5f1, #bef8f5, #dafbf9, #f6fefe
- Shades (toward black): #11a69f, #10948d, #0e8680, #0c736e, #0b6661, #09534f, #074542, #053330, #042523, #021212

## Harmonies

- Complementary: #b4131b
- Analogous: #13b45b, #136cb4
- Triadic: #ac13b4, #b4ac13
- Split-complementary: #b4136c, #b45b13
- Tetradic: #5b13b4, #b4131b, #6cb413

## Colors that go with #13b4ac

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #13b4ac: softer than #000 and cool enough to feel like part of the same palette. Seen in: Lagoon (https://brandsweets.com/palettes/vivid#lagoon), N26 (https://brandsweets.com/colors/brands/n26-com), Lido (https://brandsweets.com/palettes/vivid#lido), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #13b4ac: 5 real palettes, including Peacock and Open House, as the supporting colour. Seen in: Peacock (https://brandsweets.com/palettes/vivid#peacock), Open House (https://brandsweets.com/palettes/clean#open-house), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #13b4ac: 4 real palettes, including Unity's brand system and Patreon's brand system, as the lead colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Patreon (https://brandsweets.com/colors/brands/patreon-com), Spline (https://brandsweets.com/colors/brands/spline-design), Figma (https://brandsweets.com/colors/brands/figma). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 7 real palettes, including Ford's brand system and Confluent's brand system put Midnight Blue beside #13b4ac, as the lead colour. Seen in: Ford (https://brandsweets.com/colors/brands/ford-com), Confluent (https://brandsweets.com/colors/brands/confluent-io), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), SoFi (https://brandsweets.com/colors/brands/sofi-com). — https://brandsweets.com/colors/midnightblue
- **Mustard Yellow** #ffdb58 [pool] — 4 real palettes, including Lido and Diner put Mustard Yellow beside #13b4ac, as the accent. Seen in: Lido (https://brandsweets.com/palettes/vivid#lido), Diner (https://brandsweets.com/palettes/vivid#diner), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice). — https://brandsweets.com/colors/mustard
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #13b4ac in 4 real palettes, including Cursor's brand system and Launch Orange, as the lead colour. Seen in: Cursor (https://brandsweets.com/colors/brands/cursor-com), Launch Orange (https://brandsweets.com/palettes/bold#launch-orange), Neon (https://brandsweets.com/colors/brands/neon-tech), Figma (https://brandsweets.com/colors/brands/figma). — https://brandsweets.com/colors/orangered
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #13b4ac in 5 real palettes, including Khan Academy's brand system and Confluent's brand system, as the accent. Seen in: Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), Confluent (https://brandsweets.com/colors/brands/confluent-io), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/royalblue
- **Tomato** #ff6347 [harmony, pool: split] — Tomato is a split-complement of #13b4ac: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Lido (https://brandsweets.com/palettes/vivid#lido), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice). — https://brandsweets.com/colors/tomato

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 2.58:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0e817b (4.72:1); AA: background → #383838 (4.55:1); AAA: text → #0a615d (7.29:1); AAA: background → #141414 (7.15:1)
- On black (#000000): 8.15:1 — AA pass, AA-large pass, AAA pass

## Curated palettes containing it

- **Lagoon** (ocean, vivid, light, summer) — #06b6d4, #14b8a6, #fde68a, #ffffff, #134e4a — Turquoise and teal with a sand-yellow on white — shallow tropical water; the deep teal text is the reef. — tool: https://brandsweets.com/palettes/new/06b6d4-14b8a6-fde68a-ffffff-134e4a — collection: https://brandsweets.com/palettes/ocean

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/13b4ac-a2bcbe-d4599b-1f282d-e9f1ed?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#13b4ac" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.