# #818dbb

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

## Values

- Hex: `#818dbb`
- RGB: rgb(129, 141, 187)
- HSL: hsl(228, 30%, 62%)
- OKLCH: oklch(0.651 0.07 273)
- Relative luminance: 0.273
- Nearest named color: Galactic Gossamer (#7f8cb8, Δ 0.574) — https://brandsweets.com/colors/galactic-gossamer
- Moods: cool, muted
- Page: https://brandsweets.com/colors/818dbb

## Tints & shades

- Tints (toward white): #8e99c2, #98a2c8, #a5aecf, #afb7d4, #bdc3db, #cacfe2, #d4d8e8, #e1e4ef, #ebedf4, #f8f9fb
- Shades (toward black): #6d7bb0, #5969a6, #505e95, #465281, #3b456d, #30385a, #252c46, #1d2135, #121521, #07080d

## Harmonies

- Complementary: #bbb081
- Analogous: #81aabb, #9281bb
- Triadic: #bb818d, #8dbb81
- Split-complementary: #bb9281, #aabb81
- Tetradic: #bb81aa, #bbb081, #81bb92

## Colors that go with #818dbb

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 #818dbb: softer than #000 and cool enough to feel like part of the same palette. Seen in: Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue), Plaid (https://brandsweets.com/colors/brands/plaid-com), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Hermès (https://brandsweets.com/colors/brands/hermes-com). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: split] — Copper is a split-complement of #818dbb: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Atelier (https://brandsweets.com/palettes/elegant#atelier), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Notion (https://brandsweets.com/colors/brands/notion). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #818dbb in 7 real palettes, including Blueprint and Beach Hut, as the accent. Seen in: Blueprint (https://brandsweets.com/palettes/technical#blueprint), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/amber
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #818dbb: 6 real palettes, including Telegram's brand system and Blueprint, as the lead colour. Seen in: Telegram (https://brandsweets.com/colors/brands/telegram-org), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Snowflake AI Data Cloud (https://brandsweets.com/colors/brands/snowflake-com), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #818dbb: 7 real palettes, including Dusk and Open House, as the lead colour. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Open House (https://brandsweets.com/palettes/clean#open-house), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/denim
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #818dbb in 4 real palettes, including Terminal and Indigo SaaS, as the lead colour. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Spotify (https://brandsweets.com/colors/brands/spotify), Olympics (https://brandsweets.com/colors/brands/olympics-com). — https://brandsweets.com/colors/mediumseagreen
- **Midnight Blue** #191970 [pool] — 8 real palettes, including Plaid's brand system and Open House put Midnight Blue beside #818dbb, as the supporting colour. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Open House (https://brandsweets.com/palettes/clean#open-house), First Snow (https://brandsweets.com/palettes/cool#first-snow), SoFi (https://brandsweets.com/colors/brands/sofi-com). — https://brandsweets.com/colors/midnightblue
- **Orange** #ffa500 [pool] — 4 real palettes, including Graphite and Gopro's brand system put Orange beside #818dbb, as the accent. Seen in: Graphite (https://brandsweets.com/palettes/technical#graphite), Gopro (https://brandsweets.com/colors/brands/gopro-com), Campus (https://brandsweets.com/palettes/friendly#campus), Olympics (https://brandsweets.com/colors/brands/olympics-com). — https://brandsweets.com/colors/orange

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

- On white (#ffffff): 3.25:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #6372ab (4.64:1); AA: background → #262626 (4.66:1); AAA: text → #495688 (7.07:1)
- On black (#000000): 6.46:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #8b96c1 (7.23:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/818dbb-9c9fc4-df7c4e-231f2d-e9eff1?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: "#818dbb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.