# #e3510d

A color — warm, vivid, playful, bold. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#e3510d`
- RGB: rgb(227, 81, 13)
- HSL: hsl(19, 89%, 47%)
- OKLCH: oklch(0.627 0.193 39.7)
- Relative luminance: 0.2224
- Nearest named color: Baptism by Fire (#e6490b, Δ 1.314) — https://brandsweets.com/colors/baptism-by-fire
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/e3510d

## Tints & shades

- Tints (toward white): #f25d18, #f36e30, #f47e48, #f68f60, #f7a47d, #f9b595, #fac6ad, #fcd6c5, #fde7dd, #fef8f5
- Shades (toward black): #cf4a0c, #b7410b, #a43a0a, #913408, #7d2d07, #652406, #521d05, #3f1604, #270e02, #130701

## Harmonies

- Complementary: #0d9fe3
- Analogous: #e30d34, #e3bb0d
- Triadic: #0de351, #510de3
- Split-complementary: #0de3bb, #0d34e3
- Tetradic: #34e30d, #0d9fe3, #bb0de3

## Colors that go with #e3510d

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

- **Cadet Blue** #5f9ea0 [harmony, pool: complementary] — Cadet Blue sits directly opposite #e3510d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Diner (https://brandsweets.com/palettes/vivid#diner), Alpine (https://brandsweets.com/palettes/cool#alpine), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #e3510d: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: HubSpot (https://brandsweets.com/colors/brands/hubspot-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Harley-Davidson (https://brandsweets.com/colors/brands/harley-davidson-com). — https://brandsweets.com/colors/charcoal
- **Dodger Blue** #1e90ff [harmony, pool: split] — Dodger Blue is a split-complement of #e3510d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Replit (https://brandsweets.com/colors/brands/replit), Figma (https://brandsweets.com/colors/brands/figma), Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave). — https://brandsweets.com/colors/dodgerblue
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #e3510d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Wellness (https://brandsweets.com/palettes/warm#wellness), Netflix (https://brandsweets.com/colors/brands/netflix), Coinbase (https://brandsweets.com/colors/brands/coinbase), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com). — https://brandsweets.com/colors/seagreen
- **Amber** #ffbf00 [pool] — Amber is paired with #e3510d in 7 real palettes, including Google's brand system and Ember, as the accent. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Ember (https://brandsweets.com/palettes/bold#ember), Heatwave (https://brandsweets.com/palettes/warm#heatwave), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 8 real palettes, including Glossier's brand system and Readymag's brand system put Blue beside #e3510d, as the accent. Seen in: Glossier (https://brandsweets.com/colors/brands/glossier-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Doordash (https://brandsweets.com/colors/brands/doordash-com), Monzo (https://brandsweets.com/colors/brands/monzo-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #e3510d: 4 real palettes, including Tide's brand system and NASA's brand system, as the lead colour. Seen in: Tide (https://brandsweets.com/colors/brands/tide-com), NASA (https://brandsweets.com/colors/brands/nasa-gov), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Behance (https://brandsweets.com/colors/brands/behance-net). — https://brandsweets.com/colors/cobalt
- **Denim** #1560bd [pool] — Designers have shipped Denim with #e3510d: 17 real palettes, including Postman's brand system and PlanetScale's brand system, as the accent. Seen in: Postman (https://brandsweets.com/colors/brands/postman-com), PlanetScale (https://brandsweets.com/colors/brands/planetscale-com), Etsy (https://brandsweets.com/colors/brands/etsy-com), Strava (https://brandsweets.com/colors/brands/strava-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 3.85:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #cf4a0c (4.53:1); AA: background → #1a1a1a (4.52:1); AAA: text → #9a3709 (7.18:1)
- On black (#000000): 5.45:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #f36e30 (7.08:1)

## Brands using this color

- **Postman** — secondary #e05320 (Δ 0.864) — https://brandsweets.com/colors/brands/postman-com
- **Replit** — secondary #ec4e02 (Δ 1.652) — https://brandsweets.com/colors/brands/replit

## Fonts for this mood

- warm: https://brandsweets.com/fonts/mood/warm
- playful: https://brandsweets.com/fonts/mood/playful
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/e3510d-c4ad9c-62cbb9-2d2a1f-f1e9eb?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: "#e3510d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.