# #90eff9

A color — cool, vivid, light, technical, modern, clean. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#90eff9`
- RGB: rgb(144, 239, 249)
- HSL: hsl(186, 90%, 77%)
- OKLCH: oklch(0.897 0.091 204.3)
- Relative luminance: 0.745
- Nearest named color: Alpine Expedition (#99eeff, Δ 1.331) — https://brandsweets.com/colors/alpine-expedition
- Moods: cool, vivid, light, technical, modern, clean
- Page: https://brandsweets.com/colors/90eff9

## Tints & shades

- Tints (toward white): #99f0fa, #a3f1fa, #adf3fb, #b6f4fb, #c5f6fc, #cff8fc, #d8f9fd, #e2fbfd, #ecfcfe, #f5fefe
- Shades (toward black): #6eeaf7, #47e4f5, #25dff4, #0cd3e9, #0ab4c7, #0891a0, #07727e, #05535c, #033035, #011213

## Harmonies

- Complementary: #f99a90
- Analogous: #90f9cf, #90baf9
- Triadic: #f990ef, #eff990
- Split-complementary: #f990ba, #f9cf90
- Tetradic: #cf90f9, #f99a90, #baf990

## Colors that go with #90eff9

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 #90eff9: softer than #000 and cool enough to feel like part of the same palette. Seen in: Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Boeing (https://brandsweets.com/colors/brands/boeing-com), Sweetgreen (https://brandsweets.com/colors/brands/sweetgreen-com), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [harmony, pool: analogous] — Deep Sky Blue is #90eff9's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Calendly (https://brandsweets.com/colors/brands/calendly-com), Mistral AI (https://brandsweets.com/colors/brands/mistral-ai). — https://brandsweets.com/colors/deepskyblue
- **Goldenrod** #daa520 [harmony, pool: triadic] — Goldenrod completes a triad with #90eff9 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark), Fireside (https://brandsweets.com/palettes/dark#fireside), Noir Beauty (https://brandsweets.com/palettes/dark#noir-beauty), Mid-Century (https://brandsweets.com/palettes/warm#mid-century). — https://brandsweets.com/colors/goldenrod
- **Light Coral** #f08080 [harmony, pool: complementary] — Light Coral sits directly opposite #90eff9 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Sentry (https://brandsweets.com/colors/brands/sentry-io). — https://brandsweets.com/colors/lightcoral
- **Amber** #ffbf00 [pool] — Amber is paired with #90eff9 in 4 real palettes, including Salesforce's brand system and Blueprint, as the accent. Seen in: Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Trailhead (https://brandsweets.com/palettes/warm#trailhead), Ember (https://brandsweets.com/palettes/bold#ember). — https://brandsweets.com/colors/amber
- **Burlywood** #deb887 [pool] — Burlywood is paired with #90eff9 in 5 real palettes, including Coastal and Chalkboard, as the accent. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard), Kiln (https://brandsweets.com/palettes/dark#kiln), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar). — https://brandsweets.com/colors/burlywood
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #90eff9: 4 real palettes, including Coastal and Dusk, as the lead colour. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Dusk (https://brandsweets.com/palettes/cool#dusk), Estate (https://brandsweets.com/palettes/luxury#estate), Alpine (https://brandsweets.com/palettes/cool#alpine). — https://brandsweets.com/colors/cadetblue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #90eff9: 5 real palettes, including Dusk and Bramble, as the accent. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Bramble (https://brandsweets.com/palettes/muted#bramble), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen). — https://brandsweets.com/colors/copper

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

- On white (#ffffff): 1.32:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #077f8d (4.74:1); AA: background → #636363 (4.55:1); AAA: text → #06606b (7.26:1); AAA: background → #474747 (7.03:1)
- On black (#000000): 15.9:1 — AA pass, AA-large pass, AAA pass

## Fonts for this mood

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

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/90eff9-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: "#90eff9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.