# #51b2bd

A color — cool, modern. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#51b2bd`
- RGB: rgb(81, 178, 189)
- HSL: hsl(186, 45%, 53%)
- OKLCH: oklch(0.71 0.092 205.4)
- Relative luminance: 0.3726
- Nearest named color: Blue Bobbin (#52b4ca, Δ 1.889) — https://brandsweets.com/colors/blue-bobbin
- Moods: cool, modern
- Page: https://brandsweets.com/colors/51b2bd

## Tints & shades

- Tints (toward white): #64bac4, #72c1ca, #85c9d1, #94d0d6, #a6d8dd, #b5dee3, #c8e7ea, #d6edf0, #e9f5f7, #f8fcfc
- Shades (toward black): #43a6b1, #3c959f, #35848d, #2e727a, #29656b, #225359, #1b4246, #143134, #0d1f21, #060e0f

## Harmonies

- Complementary: #bd5c51
- Analogous: #51bd92, #517cbd
- Triadic: #bd51b2, #b2bd51
- Split-complementary: #bd517c, #bd9251
- Tetradic: #9251bd, #bd5c51, #7cbd51

## Colors that go with #51b2bd

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 #51b2bd: 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), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com). — https://brandsweets.com/colors/charcoal
- **Blue** #0000ff [pool] — 4 real palettes, including Canva's brand system and Warp's brand system put Blue beside #51b2bd, as the accent. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Unity (https://brandsweets.com/colors/brands/unity-com), Uber (https://brandsweets.com/colors/brands/uber-com). — https://brandsweets.com/colors/blue
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #51b2bd in 4 real palettes, including Warp's brand system and Oatmeal, as the accent. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Forest Floor (https://brandsweets.com/palettes/dark#forest-floor). — https://brandsweets.com/colors/darkolivegreen
- **Denim** #1560bd [pool] — Designers have shipped Denim with #51b2bd: 7 real palettes, including Open House and Coca-Cola's brand system, as the lead colour. Seen in: 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), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #51b2bd: 6 real palettes, including Patreon's brand system and Figma's brand system, as the accent. Seen in: Patreon (https://brandsweets.com/colors/brands/patreon-com), Figma (https://brandsweets.com/colors/brands/figma), Venmo (https://brandsweets.com/colors/brands/venmo-com), Unity (https://brandsweets.com/colors/brands/unity-com). — https://brandsweets.com/colors/dodgerblue
- **Goldenrod** #daa520 [harmony, pool: triadic] — Goldenrod completes a triad with #51b2bd — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark), Noir Beauty (https://brandsweets.com/palettes/dark#noir-beauty). — https://brandsweets.com/colors/goldenrod
- **Midnight Blue** #191970 [pool] — 9 real palettes, including Confluent's brand system and Ford's brand system put Midnight Blue beside #51b2bd, as the lead colour. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Ford (https://brandsweets.com/colors/brands/ford-com), SoFi (https://brandsweets.com/colors/brands/sofi-com), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/midnightblue
- **Orange** #ffa500 [pool] — 4 real palettes, including Graphite and Mistral AI's brand system put Orange beside #51b2bd, as the accent. Seen in: Graphite (https://brandsweets.com/palettes/technical#graphite), Mistral AI (https://brandsweets.com/colors/brands/mistral-ai), Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/orange

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

- On white (#ffffff): 2.48:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #348089 (4.57:1); AA: background → #3b3b3b (4.51:1); AAA: text → #276168 (7.01:1); AAA: background → #1a1a1a (7.01:1)
- On black (#000000): 8.45:1 — AA pass, AA-large pass, AAA pass

## Fonts for this mood

- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/51b2bd-a2b8be-df4e86-1f262d-e9f1ee?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: "#51b2bd" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.