# #ff5900

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

## Values

- Hex: `#ff5900`
- RGB: rgb(255, 89, 0)
- HSL: hsl(21, 100%, 50%)
- OKLCH: oklch(0.68 0.214 39.8)
- Relative luminance: 0.284
- Nearest named color: orangered (#ff4500, Δ 3.029) — https://brandsweets.com/colors/orangered
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ff5900

## Tints & shades

- Tints (toward white): #ff6a1a, #ff7a33, #ff8847, #ff9861, #ffa97a, #ffb994, #ffcaad, #ffd7c2, #ffe8db, #fff8f5
- Shades (toward black): #e65000, #d14900, #b84000, #a33900, #8a3000, #702700, #5c2000, #421700, #2e1000, #140700

## Harmonies

- Complementary: #00a6ff
- Analogous: #ff0026, #ffd900
- Triadic: #00ff59, #5900ff
- Split-complementary: #00ffd9, #0026ff
- Tetradic: #26ff00, #00a6ff, #d900ff

## Colors that go with #ff5900

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 #ff5900 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Diner (https://brandsweets.com/palettes/vivid#diner), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #ff5900: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Harley-Davidson (https://brandsweets.com/colors/brands/harley-davidson-com), HubSpot (https://brandsweets.com/colors/brands/hubspot-com), Tumblr (https://brandsweets.com/colors/brands/tumblr-com). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #ff5900 in 8 real palettes, including Heatwave and Ember, as the supporting colour. Seen in: Heatwave (https://brandsweets.com/palettes/warm#heatwave), Ember (https://brandsweets.com/palettes/bold#ember), Maple (https://brandsweets.com/palettes/warm#maple), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 7 real palettes, including Readymag's brand system and Glossier's brand system put Blue beside #ff5900, as the supporting colour. Seen in: Readymag (https://brandsweets.com/colors/brands/readymag-com), Glossier (https://brandsweets.com/colors/brands/glossier-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Doordash (https://brandsweets.com/colors/brands/doordash-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #ff5900: 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), Cobalt Pop (https://brandsweets.com/palettes/bold#cobalt-pop). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [harmony, pool: split] — Cornflower Blue is a split-complement of #ff5900: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Roblox (https://brandsweets.com/colors/brands/roblox-com), JBL (https://brandsweets.com/colors/brands/jbl-com), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #ff5900 in 8 real palettes, including Pizza Hut's brand system and Burger King's brand system, as the supporting colour. Seen in: Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Burger King (https://brandsweets.com/colors/brands/bk-com), Wise (https://brandsweets.com/colors/brands/wise-com), Redfin (https://brandsweets.com/colors/brands/redfin-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #ff5900: 13 real palettes, including Soundcloud's brand system and Strava's brand system, as the accent. Seen in: Soundcloud (https://brandsweets.com/colors/brands/soundcloud-com), Strava (https://brandsweets.com/colors/brands/strava-com), PlanetScale (https://brandsweets.com/colors/brands/planetscale-com), Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 3.14:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #d14900 (4.5:1); AA: background → #2b2b2b (4.5:1); AAA: text → #993600 (7.29:1)
- On black (#000000): 6.68:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #ff630f (7.04:1)

## Brands using this color

- **Intercom** — secondary #ff5600 (Δ 0.495) — https://brandsweets.com/colors/brands/intercom-com
- **Soundcloud** — secondary #ff5500 (Δ 0.656) — https://brandsweets.com/colors/brands/soundcloud-com
- **Cloudflare** — secondary #ff5e1f (Δ 1.026) — https://brandsweets.com/colors/brands/cloudflare
- **Prepare your taste buds...** — primary #fc5404 (Δ 1.12) — https://brandsweets.com/colors/brands/grubhub-com
- **Strava** — primary #fc5404 (Δ 1.12) — https://brandsweets.com/colors/brands/strava-com
- **Substack** — primary #fc5404 (Δ 1.12) — https://brandsweets.com/colors/brands/substack-com
- **Readymag** — accent #ff5000 (Δ 1.443) — https://brandsweets.com/colors/brands/readymag-com
- **dbt Labs** — primary #fc6304 (Δ 1.693) — https://brandsweets.com/colors/brands/getdbt-com

## Curated palettes containing it

- **Night Market** (neon, vivid, dark, warm) — #ff5f1f, #ff2fb3, #ffd400, #120b14, #fff1e6 — Orange, magenta and yellow neon on aubergine-black — the street-sign palette for food, nightlife and events. — tool: https://brandsweets.com/palettes/new/ff5f1f-ff2fb3-ffd400-120b14-fff1e6 — collection: https://brandsweets.com/palettes/neon
- **Heatwave** (summer, warm, bold, vivid) — #ff4d00, #ffb800, #0091ff, #fff9f0, #231205 — Blaze orange and hot yellow with one cold blue — the high-noon palette; use the blue where the eye needs to rest. — tool: https://brandsweets.com/palettes/new/ff4d00-ffb800-0091ff-fff9f0-231205 — collection: https://brandsweets.com/palettes/summer

## 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/ff5900-c4af9c-62cbbd-2d2a1f-f1e9ea?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: "#ff5900" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.