# #c9fa57

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

## Values

- Hex: `#c9fa57`
- RGB: rgb(201, 250, 87)
- HSL: hsl(78, 94%, 66%)
- OKLCH: oklch(0.921 0.193 124.5)
- Relative luminance: 0.8148
- Nearest named color: Chartreuse (#c1f80a, Δ 3.423) — https://brandsweets.com/colors/chartreuse-2
- Moods: vivid
- Page: https://brandsweets.com/colors/c9fa57

## Tints & shades

- Tints (toward white): #cefa66, #d2fb74, #d9fb88, #defc97, #e2fca6, #e7fdb5, #ecfdc4, #f2fed7, #f7fee6, #fcfff5
- Shades (toward black): #bff939, #b6f81b, #a5e907, #90cb06, #7bad05, #668f04, #517204, #384f02, #233102, #0e1401

## Harmonies

- Complementary: #8857fa
- Analogous: #fad957, #77fa57
- Triadic: #57c9fa, #fa57c9
- Split-complementary: #5777fa, #d957fa
- Tetradic: #57fad9, #8857fa, #fa5777

## Colors that go with #c9fa57

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

- **Blue** #0000ff [pool] — 4 real palettes, including Robinhood's brand system and Snapchat's brand system put Blue beside #c9fa57, as the supporting colour. Seen in: Robinhood (https://brandsweets.com/colors/brands/robinhood-com), Snapchat (https://brandsweets.com/colors/brands/snapchat-com), Bumble (https://brandsweets.com/colors/brands/bumble-com), Binance (https://brandsweets.com/colors/brands/binance-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #c9fa57 in 5 real palettes, including Ferrari's brand system and Wise's brand system, as the lead colour. Seen in: Ferrari (https://brandsweets.com/colors/brands/ferrari-com), Wise (https://brandsweets.com/colors/brands/wise-com), Lay's (https://brandsweets.com/colors/brands/lays-com), Tequila Sunrise (https://brandsweets.com/palettes/vivid#tequila-sunrise). — https://brandsweets.com/colors/crimson
- **Red** #ff0000 [pool] — Red is paired with #c9fa57 in 5 real palettes, including Heineken's brand system and Wise's brand system, as the accent. Seen in: Heineken (https://brandsweets.com/colors/brands/heineken-com), Wise (https://brandsweets.com/colors/brands/wise-com), Paddle (https://brandsweets.com/colors/brands/paddle-com), Phantom: The money app that'll take you placesLogo PhantomLogo PhantomLogo Phantom (https://brandsweets.com/colors/brands/phantom-com). — https://brandsweets.com/colors/red
- **Taupe** #483c32 [pool] — Taupe is paired with #c9fa57 in 5 real palettes, including Calvin Klein's brand system and Tommy Hilfiger's brand system, as the lead colour. Seen in: Calvin Klein (https://brandsweets.com/colors/brands/calvinklein-us), Tommy Hilfiger (https://brandsweets.com/colors/brands/tommy-com), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/taupe
- **Plum** #dda0dd [harmony: complementary] — Plum sits directly opposite #c9fa57 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/plum
- **Violet** #ee82ee [harmony, pool: split] — Violet is a split-complement of #c9fa57: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Gumroad (https://brandsweets.com/colors/brands/gumroad-com). — https://brandsweets.com/colors/violet
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #c9fa57: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Zendesk (https://brandsweets.com/colors/brands/zendesk-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/charcoal
- **Deep Pink** #ff1493 [pool] — 3 real palettes, including Arcade and JetBrains's brand system put Deep Pink beside #c9fa57, as the lead colour. Seen in: Arcade (https://brandsweets.com/palettes/vivid#arcade), JetBrains (https://brandsweets.com/colors/brands/jetbrains-com), Night Market (https://brandsweets.com/palettes/vivid#night-market). — https://brandsweets.com/colors/deeppink

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

- On white (#ffffff): 1.21:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #5b8104 (4.58:1); AA: background → #696969 (4.52:1); AAA: text → #435e03 (7.39:1); AAA: background → #4a4a4a (7.3:1)
- On black (#000000): 17.3:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/c9fa57-b2bea2-4e69df-232d1f-f1f0e9?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: "#c9fa57" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.