# #51abb3

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

## Values

- Hex: `#51abb3`
- RGB: rgb(81, 171, 179)
- HSL: hsl(185, 39%, 51%)
- OKLCH: oklch(0.689 0.086 203.2)
- Relative luminance: 0.3413
- Nearest named color: Atlas Cedar (#5ca0a7, Δ 3.089) — https://brandsweets.com/colors/atlas-cedar
- Moods: cool, modern
- Page: https://brandsweets.com/colors/51abb3

## Tints & shades

- Tints (toward white): #63b3bb, #71bac1, #83c3c9, #95cbd0, #a6d4d8, #b5dbde, #c6e3e6, #d8ecee, #e6f3f4, #f8fcfc
- Shades (toward black): #489ba3, #418e95, #3a7d83, #326c71, #2c5f63, #244e52, #1c3d40, #142c2e, #0e1e20, #060e0e

## Harmonies

- Complementary: #b35951
- Analogous: #51b38a, #517ab3
- Triadic: #b351ab, #abb351
- Split-complementary: #b3517a, #b38a51
- Tetradic: #8a51b3, #b35951, #7ab351

## Colors that go with #51abb3

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 #51abb3: softer than #000 and cool enough to feel like part of the same palette. Seen in: N26 (https://brandsweets.com/colors/brands/n26-com), Lido (https://brandsweets.com/palettes/vivid#lido), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine). — https://brandsweets.com/colors/charcoal
- **Terracotta** #e2725b [harmony, pool: complementary] — Terracotta sits directly opposite #51abb3 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Resort (https://brandsweets.com/palettes/light#resort), Harbour (https://brandsweets.com/palettes/cool#harbour). — https://brandsweets.com/colors/terracotta
- **Amber** #ffbf00 [pool] — Amber is paired with #51abb3 in 4 real palettes, including Blueprint and Salesforce's brand system, as the accent. Seen in: Blueprint (https://brandsweets.com/palettes/technical#blueprint), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), NBA (https://brandsweets.com/colors/brands/nba-com). — https://brandsweets.com/colors/amber
- **Burlywood** #deb887 [pool] — Burlywood is paired with #51abb3 in 4 real palettes, including Coastal and Polaroid, as the accent. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Polaroid (https://brandsweets.com/palettes/light#polaroid), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard), Kiln (https://brandsweets.com/palettes/dark#kiln). — https://brandsweets.com/colors/burlywood
- **Copper** #b87333 [pool] — Designers have shipped Copper with #51abb3: 4 real palettes, including Dusk and Riverbed, as the accent. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Atelier (https://brandsweets.com/palettes/elegant#atelier). — https://brandsweets.com/colors/copper
- **Cornflower Blue** #6495ed [harmony, pool: analogous] — Cornflower Blue is #51abb3's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Arctic (https://brandsweets.com/palettes/clean#arctic), Blueprint (https://brandsweets.com/palettes/technical#blueprint). — https://brandsweets.com/colors/cornflowerblue
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #51abb3 in 4 real palettes, including Oatmeal and Warp's brand system, as the lead colour. Seen in: Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), Warp (https://brandsweets.com/colors/brands/warp-dev), 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 #51abb3: 6 real palettes, including Open House and Dusk, as the lead colour. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Dusk (https://brandsweets.com/palettes/cool#dusk), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Peacock (https://brandsweets.com/palettes/vivid#peacock). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 2.68:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #3b8087 (4.54:1); AA: background → #363636 (4.5:1); AAA: text → #2c5f63 (7.18:1); AAA: background → #0f0f0f (7.14:1)
- On black (#000000): 7.83:1 — 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/51abb3-a2b8be-df4e88-1f262d-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: "#51abb3" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.