# #818bbb

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

## Values

- Hex: `#818bbb`
- RGB: rgb(129, 139, 187)
- HSL: hsl(230, 30%, 62%)
- OKLCH: oklch(0.647 0.073 275.1)
- Relative luminance: 0.2672
- Nearest named color: Galactic Gossamer (#7f8cb8, Δ 0.663) — https://brandsweets.com/colors/galactic-gossamer
- Moods: cool, muted
- Page: https://brandsweets.com/colors/818bbb

## Tints & shades

- Tints (toward white): #8e97c2, #98a0c8, #a5accf, #afb6d4, #bdc2db, #cacee2, #d4d7e8, #e1e3ef, #ebedf4, #f8f9fb
- Shades (toward black): #6d78b0, #5966a6, #505c95, #465081, #3b436d, #30375a, #252b46, #1d2135, #121421, #07080d

## Harmonies

- Complementary: #bbb181
- Analogous: #81a8bb, #9481bb
- Triadic: #bb818b, #8bbb81
- Split-complementary: #bb9481, #a8bb81
- Tetradic: #bb81a8, #bbb181, #81bb94

## Colors that go with #818bbb

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 #818bbb: 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 #818bbb: 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), Notion (https://brandsweets.com/colors/brands/notion), Riverbed (https://brandsweets.com/palettes/muted#riverbed). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #818bbb 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 #818bbb: 5 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 #818bbb: 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 #818bbb in 4 real palettes, including Indigo SaaS and Olympics's brand system, as the accent. Seen in: Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Olympics (https://brandsweets.com/colors/brands/olympics-com), Terminal (https://brandsweets.com/palettes/technical#terminal), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/mediumseagreen
- **Midnight Blue** #191970 [pool] — 8 real palettes, including Plaid's brand system and Open House put Midnight Blue beside #818bbb, 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 #818bbb, 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): 3.31:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #6772ad (4.58:1); AA: background → #262626 (4.57:1); AAA: text → #495488 (7.22:1)
- On black (#000000): 6.34:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #8b94c1 (7.1:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/818bbb-9c9ec4-df814e-231f2d-e9eef1?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: "#818bbb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.