# #18fb91

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

## Values

- Hex: `#18fb91`
- RGB: rgb(24, 251, 145)
- HSL: hsl(152, 97%, 54%)
- OKLCH: oklch(0.869 0.214 154.4)
- Relative luminance: 0.7123
- Nearest named color: mediumspringgreen (#00fa9a, Δ 1.169) — https://brandsweets.com/colors/mediumspringgreen
- Moods: vivid
- Page: https://brandsweets.com/colors/18fb91

## Tints & shades

- Tints (toward white): #2cfc9b, #45fca7, #59fcb0, #72fdbc, #86fdc6, #9bfdcf, #b4fedb, #c8fee5, #e1fff1, #f5fffa
- Shades (toward black): #04f685, #03dd77, #03c46a, #03ab5c, #02924f, #027941, #015f34, #014626, #012d18, #00140b

## Harmonies

- Complementary: #fb1882
- Analogous: #18fb20, #18f4fb
- Triadic: #9118fb, #fb9118
- Split-complementary: #fb18f4, #fb2018
- Tetradic: #2018fb, #fb1882, #f4fb18

## Colors that go with #18fb91

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

- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #18fb91 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/violet
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #18fb91: softer than #000 and cool enough to feel like part of the same palette. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #18fb91: 3 real palettes, including Prime Video's brand system and Remix's brand system, as the supporting colour. Seen in: Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Remix (https://brandsweets.com/colors/brands/remix-run), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Light Coral** #f08080 [harmony: split] — Light Coral is a split-complement of #18fb91: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lightcoral
- **Plum** #dda0dd [harmony: split] — Plum is a split-complement of #18fb91: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Yellow Green** #9acd32 [harmony, pool: analogous] — Yellow Green is #18fb91's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Monster Energy (https://brandsweets.com/colors/brands/monsterenergy-com). — https://brandsweets.com/colors/yellowgreen
- **Crimson** #dc143c [pool] — Crimson is paired with #18fb91 in two real palettes: Wise's brand system and Formula 1's brand system, as the accent. Seen in: Wise (https://brandsweets.com/colors/brands/wise-com), Formula 1 (https://brandsweets.com/colors/brands/formula1-com). — https://brandsweets.com/colors/crimson
- **Red** #ff0000 [pool] — Red is paired with #18fb91 in two real palettes: Gatorade's brand system and Wise's brand system, as the supporting colour. Seen in: Gatorade (https://brandsweets.com/colors/brands/gatorade-com), Wise (https://brandsweets.com/colors/brands/wise-com). — https://brandsweets.com/colors/red

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

- On white (#ffffff): 1.38:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #028849 (4.55:1); AA: background → #5e5e5e (4.71:1); AAA: text → #026436 (7.29:1); AAA: background → #424242 (7.3:1)
- On black (#000000): 15.25:1 — 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/18fb91-a2beb4-d459ce-1f2d2d-e9f1ea?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: "#18fb91" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.