# #81aee4

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

## Values

- Hex: `#81aee4`
- RGB: rgb(129, 174, 228)
- HSL: hsl(213, 65%, 70%)
- OKLCH: oklch(0.739 0.092 253.5)
- Relative luminance: 0.4054
- Nearest named color: Birdie Num Num (#89acda, Δ 1.584) — https://brandsweets.com/colors/birdie-num-num
- Moods: cool, vivid, light, technical, modern, clean
- Page: https://brandsweets.com/colors/81aee4

## Tints & shades

- Tints (toward white): #8db6e7, #9abeea, #a2c3eb, #afcbee, #bcd4f1, #c8dcf3, #d5e4f6, #dde9f8, #eaf1fb, #f7fafd
- Shades (toward black): #639bde, #4a8ad9, #2d77d2, #2769b9, #21589c, #1b487e, #153965, #0f2948, #0a1a2e, #040a11

## Harmonies

- Complementary: #e4b781
- Analogous: #81dfe4, #8681e4
- Triadic: #e481ae, #aee481
- Split-complementary: #e48681, #dfe481
- Tetradic: #e481df, #e4b781, #81e486

## Colors that go with #81aee4

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 #81aee4: softer than #000 and cool enough to feel like part of the same palette. Seen in: Mercury (https://brandsweets.com/colors/brands/mercury-com), Harbour (https://brandsweets.com/palettes/cool#harbour), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Blizzard (https://brandsweets.com/colors/brands/blizzard-com). — https://brandsweets.com/colors/charcoal
- **Goldenrod** #daa520 [harmony, pool: complementary] — Goldenrod sits directly opposite #81aee4 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark). — https://brandsweets.com/colors/goldenrod
- **Amber** #ffbf00 [pool] — Amber is paired with #81aee4 in 4 real palettes, including NBA's brand system and Blueprint, as the lead colour. Seen in: NBA (https://brandsweets.com/colors/brands/nba-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Salesforce (https://brandsweets.com/colors/brands/salesforce-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 4 real palettes, including Canva's brand system and Spotify's brand system put Blue beside #81aee4, as the accent. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Spotify (https://brandsweets.com/colors/brands/spotify), Warp (https://brandsweets.com/colors/brands/warp-dev), Uber (https://brandsweets.com/colors/brands/uber-com). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #81aee4 in 4 real palettes, including Ahrefs's brand system and Learning App, as the lead colour. Seen in: Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Learning App (https://brandsweets.com/palettes/playful#learning-app), PayPal (https://brandsweets.com/colors/brands/paypal-com), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/darkorange
- **Denim** #1560bd [pool] — Designers have shipped Denim with #81aee4: 7 real palettes, including Coca-Cola's brand system and Venmo's brand system, as the accent. Seen in: Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Open House (https://brandsweets.com/palettes/clean#open-house), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #81aee4: 4 real palettes, including Patreon's brand system and Venmo's brand system, as the accent. Seen in: Patreon (https://brandsweets.com/colors/brands/patreon-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Opensea (https://brandsweets.com/colors/brands/opensea-io), Figma (https://brandsweets.com/colors/brands/figma). — https://brandsweets.com/colors/dodgerblue
- **Emerald Green** #50c878 [harmony, pool: triadic] — Emerald Green completes a triad with #81aee4 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Supabase (https://brandsweets.com/colors/brands/supabase), Obsidian (https://brandsweets.com/colors/brands/obsidian-md), Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark). — https://brandsweets.com/colors/emerald-green

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

- On white (#ffffff): 2.31:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2c75ce (4.62:1); AA: background → #3d3d3d (4.71:1); AAA: text → #21589c (7.14:1); AAA: background → #1f1f1f (7.15:1)
- On black (#000000): 9.11:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Calm** — secondary #87b3ee (Δ 1.97) — https://brandsweets.com/colors/brands/calm-com

## 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/81aee4-9ca9c4-df584e-1f202d-e9f0f1?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: "#81aee4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.