# #678da2

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

## Values

- Hex: `#678da2`
- RGB: rgb(103, 141, 162)
- HSL: hsl(201, 24%, 52%)
- OKLCH: oklch(0.623 0.053 232.9)
- Relative luminance: 0.2454
- Nearest named color: lightslategray (#778899, Δ 2.345) — https://brandsweets.com/colors/lightslategray
- Moods: cool, muted
- Page: https://brandsweets.com/colors/678da2

## Tints & shades

- Tints (toward white): #7799ac, #84a3b3, #93afbd, #a0b8c5, #b0c4cf, #c0d0d8, #ccd9e0, #dce5ea, #e9eef1, #f9fafb
- Shades (toward black): #5b8095, #517385, #4a6878, #405a68, #364d59, #2d3f49, #233139, #1b262c, #11191c, #080b0d

## Harmonies

- Complementary: #a27c67
- Analogous: #67a299, #6770a2
- Triadic: #a2678d, #8da267
- Split-complementary: #a26770, #a29967
- Tetradic: #9967a2, #a27c67, #70a267

## Colors that go with #678da2

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 #678da2: 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), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Hermès (https://brandsweets.com/colors/brands/hermes-com), PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainment (https://brandsweets.com/colors/brands/playstation-com). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #678da2 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Atelier (https://brandsweets.com/palettes/elegant#atelier), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Riverbed (https://brandsweets.com/palettes/muted#riverbed). — https://brandsweets.com/colors/copper
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #678da2: 4 real palettes, including Ink & Paper and Hershey's's brand system, as the accent. Seen in: Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #678da2 in 6 real palettes, including Retro Pop and Diner, as the lead colour. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Diner (https://brandsweets.com/palettes/vivid#diner), Redfin (https://brandsweets.com/colors/brands/redfin-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #678da2: 4 real palettes, including Telegram's brand system and Astro's brand system, as the lead colour. Seen in: Telegram (https://brandsweets.com/colors/brands/telegram-org), Astro (https://brandsweets.com/colors/brands/astro-build), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Snowflake AI Data Cloud (https://brandsweets.com/colors/brands/snowflake-com). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #678da2: 10 real palettes, including Dusk and Campus, as the lead colour. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Campus (https://brandsweets.com/palettes/friendly#campus), Peacock (https://brandsweets.com/palettes/vivid#peacock), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/denim
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #678da2 in 4 real palettes, including Ledger Dark and Noir Beauty, as the lead colour. Seen in: Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark), Noir Beauty (https://brandsweets.com/palettes/dark#noir-beauty), Open House (https://brandsweets.com/palettes/clean#open-house), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold). — https://brandsweets.com/colors/goldenrod
- **Midnight Blue** #191970 [pool] — 10 real palettes, including Plaid's brand system and Ford's brand system put Midnight Blue beside #678da2, as the supporting colour. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Ford (https://brandsweets.com/colors/brands/ford-com), SoFi (https://brandsweets.com/colors/brands/sofi-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 3.55:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #577b8e (4.54:1); AA: background → #212121 (4.53:1); AAA: text → #405a68 (7.29:1)
- On black (#000000): 5.91:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #7a9cae (7.19:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/678da2-9cb1c4-df4e62-1f222d-e9f1f0?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: "#678da2" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.