# #515381

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

## Values

- Hex: `#515381`
- RGB: rgb(81, 83, 129)
- HSL: hsl(238, 23%, 41%)
- OKLCH: oklch(0.461 0.074 281.1)
- Relative luminance: 0.0952
- Nearest named color: Dusk (#4e5481, Δ 0.506) — https://brandsweets.com/colors/dusk
- Moods: cool, muted
- Page: https://brandsweets.com/colors/515381

## Tints & shades

- Tints (toward white): #5c5e93, #686aa1, #7b7dad, #8e8fb8, #a1a2c4, #b1b2ce, #c3c4da, #d6d7e5, #e6e6ef, #f9f9fb
- Shades (toward black): #494a74, #43446b, #3b3c5e, #333452, #2d2e48, #25263c, #1d1e2f, #161623, #101019, #08080d

## Harmonies

- Complementary: #817f51
- Analogous: #516a81, #675181
- Triadic: #815152, #528151
- Split-complementary: #816751, #6a8151
- Tetradic: #81516a, #817f51, #518167

## Colors that go with #515381

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #515381's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Capital One (https://brandsweets.com/colors/brands/capitalone-com), American Express (https://brandsweets.com/colors/brands/americanexpress-com), Auth0 (https://brandsweets.com/colors/brands/auth0-com), Discover (https://brandsweets.com/colors/brands/discover-com). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 5 real palettes, including Tesco's brand system and CVS's brand system put Blue beside #515381, as the supporting colour. Seen in: Tesco (https://brandsweets.com/colors/brands/tesco-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Activision (https://brandsweets.com/colors/brands/activision-com), Pixar (https://brandsweets.com/colors/brands/pixar-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #515381 in 13 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour. Seen in: Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Costco (https://brandsweets.com/colors/brands/costco-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #515381: 16 real palettes, including HP's brand system and The New York Times's brand system, as the accent. Seen in: HP (https://brandsweets.com/colors/brands/hp-com), The New York Times (https://brandsweets.com/colors/brands/nytimes-com), Dutch Bros (https://brandsweets.com/colors/brands/dutchbros-com), Unilever (https://brandsweets.com/colors/brands/unilever-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #515381: 5 real palettes, including Campbell's's brand system and Fireside, as the supporting colour. Seen in: Campbell's (https://brandsweets.com/colors/brands/campbells-com), Fireside (https://brandsweets.com/palettes/dark#fireside), AT&T (https://brandsweets.com/colors/brands/att-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/firebrick
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #515381 in 4 real palettes, including Open House and Mid-Century, as the accent. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Fireside (https://brandsweets.com/palettes/dark#fireside). — https://brandsweets.com/colors/goldenrod
- **Light Coral** #f08080 [pool] — Designers have shipped Light Coral with #515381: 4 real palettes, including Target : Expect More. Pay Less.'s brand system and Blush, as the supporting colour. Seen in: Target : Expect More. Pay Less. (https://brandsweets.com/colors/brands/target-com), Blush (https://brandsweets.com/palettes/light#blush), Sentry (https://brandsweets.com/colors/brands/sentry-io), Cobalt Pop (https://brandsweets.com/palettes/bold#cobalt-pop). — https://brandsweets.com/colors/lightcoral
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #515381: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 7.23:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.9:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #6f71a5 (4.58:1); AA: background → #cccccc (4.5:1); AAA: text → #9193ba (7.09:1); AAA: background → #fcfcfc (7.05:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/515381-9f9cc4-df944e-251f2d-e9edf1?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: "#515381" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.