Color
#ef0121
#ef0121rgb(239, 1, 33)hsl(352, 99%, 47%)oklch(0.599 0.243 26.2)Colors that go with #ef0121
Charcoal, Royal Blue and Steel Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #ef0121: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #ef0121 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
split-complementshippedSteel Blue is a split-complement of #ef0121: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #ef0121 in 5 real palettes, including Wired's brand system and Heatwave, as the accent — a combination designers have actually shipped, not a computed rotation.
Blue #0000ff
shippedBlue is paired with #ef0121 in 8 real palettes, including native Cybersecurity's brand system and Gap's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #ef0121 in 14 real palettes, including ElevenLabs's brand system and Netflix's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #ef0121 in 5 real palettes, including Databricks's brand system and Figma's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Gold #ffd700
shippedGold is paired with #ef0121 in 8 real palettes, including Lay's's brand system and Paddle's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #ef0121
Tints & shades
Harmonies
Contrast
| #ef0121 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.47:1 | fail | pass | fail | |
Aaon black | 4.7:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ef0121 as the background.
Brands using this color
- Mattelsecondary · #ee0024 · Δ0.305
- Verceldanger · #ee0000 · Δ1.351
- LGsecondary · #ea1917 · Δ1.408
- native Cybersecuritysecondary · #ec0000 · Δ1.487
- Tindersecondary · #ec180e · Δ1.501
- Wiredsecondary · #eb0000 · Δ1.59
- Twitchaccent · #eb0400 · Δ1.604
- Formula 1accent · #e8002d · Δ1.726
- ElevenLabsprimary · #f41a2f · Δ1.754
- ElevenLabssecondary · #f41a2f · Δ1.754
- Databrickssecondary · #eb1600 · Δ1.84
- Pinterestaccent · #e60023 · Δ1.862
- Marvelaccent · #e62429 · Δ1.955
Fonts for this mood
#ef0121 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #ef0121 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/ef0121-c49c9d-62cb8a-2d231f-f1e9ee?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md