# #310ea4

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

## Values

- Hex: `#310ea4`
- RGB: rgb(49, 14, 164)
- HSL: hsl(254, 84%, 35%)
- OKLCH: oklch(0.357 0.208 278.2)
- Relative luminance: 0.0365
- Nearest named color: Galactic Highway (#3311bb, Δ 3.987) — https://brandsweets.com/colors/galactic-highway
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/310ea4

## Tints & shades

- Tints (toward white): #3a11c0, #4414e1, #5527ec, #6b43ef, #8564f2, #9b80f4, #b19cf6, #c8b9f9, #e1d9fc, #f8f6fe
- Shades (toward black): #2d0d96, #290c88, #250b7a, #20096c, #1c085e, #17074b, #12053d, #0e042f, #0a0321, #060213

## Harmonies

- Complementary: #81a40e
- Analogous: #0e36a4, #7c0ea4
- Triadic: #a4310e, #0ea431
- Split-complementary: #a47c0e, #36a40e
- Tetradic: #a40e36, #81a40e, #0ea47c

## Colors that go with #310ea4

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 #310ea4's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Hershey's (https://brandsweets.com/colors/brands/hersheys-com), FedEx (https://brandsweets.com/colors/brands/fedex-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 4 real palettes, including Procter & Gamble's brand system and Pfizer's brand system put Blue beside #310ea4, as the supporting colour. Seen in: Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Pfizer (https://brandsweets.com/colors/brands/pfizer-com), Zillow (https://brandsweets.com/colors/brands/zillow-com), CVS (https://brandsweets.com/colors/brands/cvs-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #310ea4: 5 real palettes, including Tide's brand system and Purina Pro Plan's brand system, as the lead colour. Seen in: Tide (https://brandsweets.com/colors/brands/tide-com), Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Zillow (https://brandsweets.com/colors/brands/zillow-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #310ea4 in 5 real palettes, including Pepsi's brand system and Behance's brand system, as the supporting colour. Seen in: Pepsi (https://brandsweets.com/colors/brands/pepsi-com), Behance (https://brandsweets.com/colors/brands/behance-net), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #310ea4: 4 real palettes, including Unilever's brand system and Warbyparker's brand system, as the accent. Seen in: Unilever (https://brandsweets.com/colors/brands/unilever-com), Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com), Intel (https://brandsweets.com/colors/brands/intel-com), Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #310ea4: 4 real palettes, including 3M's brand system and Datadog's brand system, as the supporting colour. Seen in: 3M (https://brandsweets.com/colors/brands/3m-com), Datadog (https://brandsweets.com/colors/brands/datadoghq-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), MLB (https://brandsweets.com/colors/brands/mlb-com). — https://brandsweets.com/colors/firebrick
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #310ea4 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/olive
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #310ea4: softer than #000 and cool enough to feel like part of the same palette. Seen in: dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/charcoal

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

- On white (#ffffff): 12.14:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.73:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #7e5bf1 (4.65:1); AA: background → #9e9e9e (4.53:1); AAA: text → #9f85f4 (7.14:1); AAA: background → #c7c7c7 (7.18:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/310ea4-aa9cc4-dfbb4e-291f2d-e9ebf1?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: "#310ea4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.